Statistical tests Essays & Research Papers

Best Statistical tests Essays

  • Statistical Tests - 12600 Words
    One sample t-test A one sample t-test allows us to test whether a sample mean (of a normally distributed interval variable) significantly differs from a hypothesized value. For example, using the hsb2 data file, say we wish to test whether the average writing score (write) differs significantly from 50. We can do this as shown below. ttest write=50 One-sample t test ------------------------------------------------------------------------------ Variable | Obs Mean Std. Err....
    12,600 Words | 46 Pages
  • Friedman Test - 222 Words
    Friedman Test for a random Block Design -The Friedman Test is used when compairing more than two populations or treatments randomly assigned within blocks. This is the counterpart of the F test or ANOVA used in parametric statistics. Unlike the F test or ANOVA which is used with the assumption that the observations taken from each of the populations are normally distributed, the Friedman test is used when no distrubutional assumptions are necessary. The following are the steps in doing the...
    222 Words | 2 Pages
  • Friedman Test - 491 Words
    test MAN o Fj c introductio n The Friedman Test is used when comparing more than two populations or treatments randomly assigned within blocks. This is the counterpart of the F test or ANOVA used in parametric statistics. Unlike the F Test or ANOVA which is used with the assumption that the observations taken from each of the populations are normally distributed, the Friedman test is used when no distributional assumption are necessary. c j discussio n g STEP ONE State the null...
    491 Words | 5 Pages
  • Statistical Analyses Using SPSS
    Statistical Tests in SPSS 1 of 27 http://www.ats.ucla.edu/stat/spss/whatstat/whatstat.htm Stat Computing > SPSS > Whatstat Help the Stat Consulting Group by giving a gift Search What statistical analysis should I use? Statistical analyses using SPSS Introduction This page shows how to perform a number of statistical tests using SPSS. Each section gives a brief description of the aim of the statistical test, when it is used, an example showing the SPSS commands and SPSS (often...
    6,692 Words | 37 Pages
  • All Statistical tests Essays

  • Statistical Hypothesis Testing and Teaching Methods
    Kruskal-Wallis Tests in SPSS STAT 314 Three teaching methods were tested on a group of 19 students with homogeneous backgrounds in statistics and comparable aptitudes. Each student was randomly assigned to a method and at the end of a 6-week program was given a standardized exam. Because of classroom space and group size, the students were not equally allocated to each method. The results are shown in the table below. Test for a difference in distributions (medians) of the test scores for...
    451 Words | 3 Pages
  • Hypothesis Test for Laboratories - 688 Words
    Worked example from Tutorial 8 8.3 Three laboratories, A, B, and C, are used by food manufacturing companies for making nutrition analyses of their products. The following data are the fat contents (in grams) of the same weight of three similar types of peanut butter. | |Laboratory | |Peanut Butter |A |B |C |D | |Brand 1...
    688 Words | 4 Pages
  • Non-Parametric Tests and Its Application in Management
    NON-PARAMETRIC TESTS AND ITS APPLICATION IN MANAGEMENT. SUBMITTED BY : SHARDA HARYANI NON-PARAMETRIC TESTS AND ITS APPLICATION IN MANAGEMENT INTRODUCTION Everything that we have done up until now in statistics has relied heavily on one major fact: that our data is normally distributed. Wehave beenable to make inferences about population means (one-sample, two-sample z and t...
    2,582 Words | 9 Pages
  • Dickey Fullers Test Using Spss
    Dickey Fuller Test using SPSS (Field, 2009, p. 46) SPSS is referred to as a computer application that is used for mining data, authoring of surveys analysis of statistics, carrying out analysis of texts as well as deployment and collaboration. The fundamental features of SPSS include data analysis modules which are inclusive of arithmetical descriptions like plots, frequencies, charts, lists as well as complex procedures in statistics the table on variance analysis (ANOVA). Recently, an...
    378 Words | 2 Pages
  • Statistics: Statistical Hypothesis Testing and Easy Keywords
    CHAPTER 10: TWO-SAMPLE TESTS WITH NUMERICAL DATA 1. The t test for the difference between the means of 2 independent populations assumes that the respective a) sample sizes are equal. b) sample variances are equal. c) populations are approximately normal. d) all of the above ANSWER: c TYPE: MC DIFFICULTY: Moderate KEYWORDS: pooled-variance t test, assumption 2. The t test for the mean difference between 2 related populations...
    6,986 Words | 39 Pages
  • Introduction to the Practice of Statistics - 12600 Words
    One sample t-test A one sample t-test allows us to test whether a sample mean (of a normally distributed interval variable) significantly differs from a hypothesized value. For example, using the hsb2 data file, say we wish to test whether the average writing score (write) differs significantly from 50. We can do this as shown below. ttest write=50 One-sample t test ------------------------------------------------------------------------------ Variable | Obs Mean Std. Err....
    12,600 Words | 46 Pages
  • Hypothesis Tecsting - 6986 Words
    Chapter-11 Testing of Hypothesis: (Non-parametric Tests) Chapter-11: Testing of Hypothesis - (Non-parametric Tests) 2 11.1. Chi - square ( χ )Test / Distribution 2 11.1.1. Meaning of Chi - square ( χ )Test 2 11.1.2. Characteristics of Chi - square ( χ )Test 2 11.2. Types of Chi - square ( χ )Test / Distribution 2 11.2.1. Chi - square ( χ )Test for Population Variance 2 11.2.2. Chi - square ( χ )Test for Goodness-of-Fit 2 11.2.3. Chi - square ( χ )Test or...
    6,986 Words | 116 Pages
  • Chi- square - 267 Words
    A chi-squared test, also referred to as chi-square test or χw² test, is any statistical hypothesis test in which the sampling distribution of the test statistic is a chi-squared distribution when the null hypothesis is true. Also considered a chi-squared test is a test in which this is asymptotically true, meaning that the sampling distribution (if the null hypothesis is true) can be made to approximate a chi-squared distribution as closely as desired by making the sample size large enough....
    267 Words | 1 Page
  • 334 Assignment - 1371 Words
    b. c. | | Null Hypothesis: MANUF has a unit root | | Exogenous: Constant | | | Lag Length: 0 (Automatic - based on SIC, maxlag=21) | | | | | | | | | | | | | | t-Statistic | Prob.* | | | | | | | | | | | Augmented Dickey-Fuller test statistic | -29.65726 | 0.0000 | Test critical values: | 1% level | | -3.436548 | | | 5% level | | -2.864165 | | | 10% level | | -2.568220 | | | | | | | | | | | | *MacKinnon...
    1,371 Words | 9 Pages
  • Non parametric assignment - 3701 Words
    Abstract— There is lots of foods sells in UTAR. This research examined the students’ opinion towards foods in UTAR cafeteria. However, this survey focused in Faculty of Engineering and Science (FES) in KL Setapak Campus only. UTAR students were tested on their response about different types of foods that being sold in UTAR cafeteria: mixed rice, chicken rice, nasi lemak, spaghetti and noodles as well as the service that provide by UTAR cafeteria staffs. This research is evaluated by obtaining...
    3,701 Words | 13 Pages
  • Simulation of a Bank Queue - 2988 Words
    Contents Problem Definition and Goals 3 About the Bank 3 Logical Model 4 Data Gathering and Analysis 6 Arena Model Implementation 18 Step by Step implementation 18 Time Logic 18 Cutoff Logic 18 Verification and Validation 19 Prediction Function / Conclusion 23 Appendices 27 Appendix 1 : side Results 27 Problem Definition and Goals The purpose of this simulation to obtain important parameters of a bank queue, including bank information, queue length, waiting time in...
    2,988 Words | 13 Pages
  • PSY 325 Week 5 DQ1
    This archive file of PSY 325 Week 5 Discussion Question 1 Chi-Square Goodness-of-Fit Test contains: Describe the chi-square goodness-of-fit test. Provide a detailed explanation of what this test measures, and how it is similar to and different from the independent t-test. How do you know when to use one analysis over the other? Provide a real-world example. Guided response: Review your classmates Psychology - General Psychology Chi-Square Goodness-of-Fit Test . Describe the chi-square...
    479 Words | 2 Pages
  • Null Hypothesis and Gas Mileage
    Tutorial Note 5 • Chapter 17 Hypothesis Testing • Chapter 18 Measures of Association Objective: Computer laboratory session (II) – Please refer to the Computer Lab Notes Discussion Question 1 H0 – Null Hypothesis: a statement you want to reject (E.g Average = 50) H1/HA – Alternative Hypothesis: a statement you want to prove (E.g Average is not 50) What is related/dependent sample? H0: Tutorial is NOT effective H1: Tutorial is effective |Respondent...
    855 Words | 4 Pages
  • employee satisfaction - 3061 Words
    International Journal of Modern Engineering Research (IJMER) www.ijmer.com Vol.3, Issue.1, Jan-Feb. 2013 pp-523-529 ISSN: 2249-6645 A research work on Employee Satisfaction measurement with special reference to KRIBHCO, Surat Ekta Sinha Asst. Professor, Uka Tarsadia University, Gujarat Abstract: This research work has been done to measure the satisfaction level of employees with special reference to KRIBHCO, Surat. Today to sustain in such a competitive market its very important to...
    3,061 Words | 25 Pages
  • Westfield-online shopping trend
    Summary of Quantitative Results: Question 1 includes the result of a regression analysis. Results have revealed whether there is a relationship between ‘age’ and ‘shopping in-store’. From ANOVAb, it shows that sig. (0.024), which is less than 0.05, which means there is a relationship between age and in-store shopping. According to the ‘Model Summary’ table, R equals to 0.357, which means there is a slightly positive relationship and age can be 12.7% link to in-store shopping (R Square =...
    1,483 Words | 5 Pages
  • Jamaica and Trinidad and Tobago Treasury Bill Rates
    ECON3050 – Econometrics II In-course Project Table of Contents Introduction 3 Literature Review 4 Analysis 5 Conclusion 8 Appendix 9 Introduction The purpose of this project is to investigate the co-movements of Jamaica and Trinidad and Tobago Treasury bill rates, as well as to investigate whether the US Treasury bill rate Granger Cause the movement of the Treasury bill rates of both Caribbean islands. To study the co-movements between...
    8,604 Words | 55 Pages
  • Adm2304 Assignment 2 - 747 Words
    Question 1: Available on MyStatLab. Question 2: Two polls (each based on a random sample of 1000) released just before the recent Ontario provincial election seemed to suggest conflicting outcomes. The breakdown in percentages for the two polls were: Liberal PC NDP Green Angus Reid 33% 36% 26% 5% Ekos 37.7% 31.5% 23.3% 5.9% (a) Test at the .05 level of significance whether the data constitute evidence of a real overall disagreement between the two polls. (b)...
    747 Words | 4 Pages
  • SPSS Report - 2522 Words
     QMS 202 – SPSS Term Project Winter 2012 Submitted: March 29th 2012 Dr. Changping Wang QMS 202 – SPSS Project Part A – Mean Prices between Residential Properties in Toronto, San Francisco and Montreal Introduction The data for the first test to be conducted by our group consists of the prices of residential properties in various locations. The locations are Toronto, San Francisco and Montreal. The values of the samples are all represented in Canadian Dollars....
    2,522 Words | 16 Pages
  • Bus 308 Week 4 Assignment
    BUS 308 Week 4 assignment_ 9.13_9.22_and 12.10_12.18(a) 9.13 Recall that “very satisfied” customers gave the XYZ-Box video game system a rating that is at least 42. Suppose that the manufacturer of the XYZ-Box wishes to use the random sample of 65 satisfaction ratings to provide evidence supporting the claim that the mean composite satisfaction rating for the XYZ-Box exceeds 42. a. Letting represent the mean composite satisfaction rating for the XYZ-Box, set up the null hypothesis and...
    923 Words | 4 Pages
  • research paper - 20252 Words
    Saurashtra University Re – Accredited Grade ‘B’ by NAAC (CGPA 2.93) Vaishnani Haresh B., 2011, Effects of Sales Promotions on Consumer Preferences and Brand Equity Perception: with specific reference to FMCG Products, thesis PhD, Saurashtra University http://etheses.saurashtrauniversity.edu/id/eprint/63 Copyright and moral rights for this thesis are retained by the author A copy can be downloaded for personal non-commercial research or study, without prior permission or charge....
    20,252 Words | 185 Pages
  • Data Analysis Methods Used in Quantitative Research.
    DEFINITION: Quantitative methods are research techniques that are used to gather quantitative data — information dealing with numbers and anything that is measurable e.g. Statistics, tables and graphs, are often used to present the results of these methods. Quantitative research methods were originally developed in the natural sciences to study natural phenomena. However examples of quantitative methods now well accepted in the social sciences and education. Differences between parametric...
    4,348 Words | 16 Pages
  • Final Project Research Chi Square
    Preliminary Info Dataset: Crime During the Transition to Adulthood: How Youth Fare As They Leave Out-of-Home Care in Illinois, Iowa, and Wisconsin, 2002-2007 Independent variable: In foster care (No (0), Yes (1)) Dependent variable: Taking part in a group fight (No (0), Yes (1)) Research question: Is there an association being in foster care and taking part in a group fight? Null hypothesis: There is no association between being in foster care and taking part in a group fight. Alternate...
    530 Words | 4 Pages
  • Intro to statistics - 1172 Words
    Step 1- Identify the problem Develop a problem statement- What are you going to investigate (use the 6 characteristics of a good problem statement) 1. Be interested in the problem 2. Have a manageable scope 3. Be comfortable in terms of the knowledge, time, and resources needed to investigate the problem 4. Be able to collect and analyze numerical data 5. Must be a practical or theoretical reason for you to research the problem 6. It must be ethical for you to investigate the...
    1,172 Words | 5 Pages
  • Employee Welfare - 4771 Words
    CHAPTER – I INTRODUCTION 1.1 OUTLINE OF THE PROJECT: A job analysis is a step-by-step specification of an employment position's requirements, functions, and procedures. Just as a seed cannot blossom into a flower unless the ground is properly prepared, many human resource management (HRM) practices cannot blossom into competitive advantage unless grounded on an adequate job analysis. Successful HRM practices can lead to outcomes that create competitive advantage. Job analyses,...
    4,771 Words | 34 Pages
  • Quantitative Analysis for Managerial Applications
    ASSIGNMENTS Course Code : MS 08 Course Title : Quantitative Analysis for Managerial Applications Assignment No. : MS-08/TMA/SEM-I/2013 Coverage : All Blocks Note : Attempt all the questions and submit this assignment on or before 30th April, 2013 to the coordinator of your study center. 1. A sum of `8550 is to be paid in 15 installments where each installment is `10 more than the previous installment. Find the first installment and the last installment. Let x = the first...
    1,330 Words | 5 Pages
  • Two Sample Hypothesis - 1370 Words
    Nonparametric Hypothesis Testing Paper Team B RES 342 Eric Hogan University of Phoenix Nonparametric Hypothesis Testing Nonparametric testing does not depend on certain data in a particular distribution. Also, nonparametric testing applies techniques that do not assume that the basis of a model is predetermined. In a previous paper we discussed a hypothesis with single and double samples. Now we will conduct the equivalent, nonparametric test of the real estate hypothesis using...
    1,370 Words | 5 Pages
  • How would you explain the analysis of variance, assuming that your audience has not had a statistics class before?
    Wk 4, DQ1 How would you explain the analysis of variance, assuming that your audience has not had a statistics class before? When one does a study of data, generally this implies an evaluation of the "mean" or average of that data. .i.e. What is the average time it takes a 5th grader to complete his final math exam? A t test is used to test differences between two means. i.e. the mean of the experiment group vs a control group. An ANOVA test, on the other hand, is indicated when there are...
    548 Words | 16 Pages
  • Food for Fork - Statistics Case Study
    Food for Fork Case Study by Tony Mayer 1. Is the average amount that people are willing to pay for an entrée less than the forecast value of $19? 2.1. Null and alternate hypotheses H0: Average amount people are willing to pay for entrée = $19 HA: Average amount people are willing to pay for entrée < $19 2.2. Statistical technique chosen to test the hypothesis One sample t-test 2.3. Summary of the nature (characteristics) of the test selected...
    4,086 Words | 17 Pages
  • Hypothesis Testing - Paper - 4252 Words
    Hypothesis Testing * Used to prove which are the factors that are actually impacting the mean or standard deviation of the project y. * To see the impact of improvements after they are implemented * P- value is critical in making decisions. * To determine if the statistical hypothesis is true or false, the entire population should be examined, which becomes impossible for large sizes, Random sampling is done. * The conclusion for the population is based upon statistical...
    4,252 Words | 14 Pages
  • Analysis of Oracle Stock Price
    Economics & Statistics Group Project Analysis of ORACLE Stock Price Page 1 of 38 Contents Contents.................................................................................................................................................. 1 Introduction ............................................................................................................................................ 3 Stepwise regression...
    5,976 Words | 21 Pages
  • Statistics Cheat Sheets - 1326 Words
    G036 * Yes because the p-value is less than 0.05 or No, because the p-value is greater than 0.05 * The coefficient of variation is the standard deviation of a data set, divided by the mean of the same data set. * Z score = x -ms * The Independent part is what you, the experimenter, changes or enacts in order to do your experiment. The dependent variable is what changes when the independent variable changes - the dependent variable depends on the outcome of the independent...
    1,326 Words | 4 Pages
  • Marketing Research: Final Exam
    Text Book Study Guide Part II BMGT452, Fall 2011 [pic] Review the scale of the measurement: Nominal, Ordinal, Interval, Ordinal. These scales determines the tests to pick. L11.1: Data Analysis Procedures, Reporting Read: Slides, Chapter 19 pp648-653, Chapter 15 pp478-493 o Data Analysis Procedure: pp478 o Validation and Editing: pp478-486 (NOT Required for Final Exam) o Coding: pp486-490 o Data Cleaning: pp491-493 (NOT Required for Final Exam)...
    1,876 Words | 8 Pages
  • Statistics Template - 842 Words
    Week 4 15.18 Sixty-four students in an introductory college economics class were asked how many credits they had earned in college, and how certain they were about their choice of major. Research question: At α = .01, is the degree of certainty independent of credits earned? Certaint Credits Earned | Very Uncertain | Somewhat certain | Very Certain | Row Total | 0–9 | 12 | 8 | 3 | 23 | 10 to 59 | 8 | 4 | 10 | 22 | 60 or more | 1 | 7 | 11 | 19 | Col Total | 21 | 19 | 24 | 64 |...
    842 Words | 5 Pages
  • Statistics Chapter 12 Solutions
    CHAPTER 12: TESTS FOR TWO OR MORE SAMPLES WITH CATEGORICAL DATA 1. When testing for independence in a contingency table with 3 rows and 4 columns, there are ________ degrees of freedom. a) 5 b) 6 c) 7 d) 12 ANSWER: b TYPE: MC DIFFICULTY: Easy KEYWORDS: chi-square test of independence, degrees of freedom 2. If we use the [pic] method of analysis to test for the differences among 4 proportions, the degrees of freedom are equal...
    9,415 Words | 50 Pages
  • Study Guide Data - 305 Words
    Data Analysis and Decision Help Session 5 Fall 2013 P1 Chi-square Test Goodness of Fit A marketing company thinks that the proportion of people who prefer to get their news from different sources are the following: 25% from the TV, 43% from the Internet, 7% from the radio and 25% from the newspaper. In order to test their claim, they collect the following data: Source Internet Radio Newspaper Count  TV 45 56 10 38 Can we be reasonably certain that their...
    305 Words | 4 Pages
  • Probability and Statistics - 8229 Words
    University of Perpetual Help System Dalta Molino Campus Molino III, Bacoor City Probability and Statistics LAGERA, Einar John A. Table of Contents Simple Correlation Analysis ................................................................................................. 1 Introduction .................................................................................................................................................................. 1 What is Correlation?...
    8,229 Words | 32 Pages
  • Imagine You Are Cultural Anthropologist Searching for a Hidden Time Capsule from Both the Renaissance and the Age of Baroque.
    Applying ANOVA and Nonparametric Tests Simulation This simulation made me make business decisions based on different kinds of tests. And making decisions based on the results. At first the simulation provided background information about the company and then it created the issue and I had to make decisions. I was given a choice to pick between a One-way ANOVA or Kruskal-Wallis and I chose the Kruskal-Wallis test. I chose that test because it is better to use it when the test is tricky to...
    381 Words | 1 Page