Preview

CH10 Comparisons Involving Means

Satisfactory Essays
Open Document
Open Document
3741 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
CH10 Comparisons Involving Means
Comparisons Involving Means Learning Objectives 1. Be able to develop interval estimates and conduct hypothesis tests about the difference between two population means when EMBED Equation.DSMT4 and EMBED Equation.DSMT4 are known. 2. Know the properties of the sampling distribution of EMBED Equation . 3. Be able to use the t distribution to conduct statistical inferences about the difference between two population means when EMBED Equation.DSMT4 and EMBED Equation.DSMT4 are unknown. 4. Learn how to analyze the difference between two population means when the samples are independent and when the samples are matched. 5. Understand the principles of experimental design. 6. Be able to analyze a completely randomized design. 7. Understand how the analysis of variance procedure can be used to determine if the means of more than two populations are equal. 8. Know the assumptions necessary to use the analysis of variance procedure. 9. Understand the use of the F distribution in performing the analysis of variance procedure. 10. Know how to set up an ANOVA table and interpret the entries in the table. 11. Be able to use output from computer software packages to solve analysis of variance problems. Solutions 1. a. EMBED Equation 13.6 - 11.6 2 b. EMBED Equation.DSMT4 1.645 EMBED Equation EMBED Equation EMBED Equation.DSMT4 Mean loan amount for 2001 H0 EMBED Equation.DSMT4 Ha EMBED Equation.DSMT4 EMBED Equation p-value 1.0000 - .9850 .0150 p-value EMBED Equation.DSMT4 .05 reject H0. The mean loan amount has increased between 2001 and 2002. 7. a. EMBED Equation.DSMT4 Population mean 2002 EMBED Equation.DSMT4 Population mean 2003 H0 EMBED Equation.DSMT4 Ha EMBED Equation.DSMT4 b. With time in minutes, EMBED Equation.DSMT4 172 - 166 6 minutes c. EMBED Equation p-value 1.0000 - .9955 .0045 p-value EMBED Equation.DSMT4 .05 reject H0. The population mean duration of games in 2003 is less than
Continue Reading
View Writing Issues

You May Also Find These Documents Helpful

  • Good Essays

    Cmo 510 Case Study
    • 873 Words
    • 4 Pages

    Cmo 510 Case Study

    The sample size is given as 11 and the level of significance is given as…

    • 873 Words
    • 4 Pages
    Good Essays
    Read More
  • Good Essays

    A3 5 AppliedStatistics
    • 1129 Words
    • 8 Pages

    A3 5 AppliedStatistics

    b. Calculate each of the following measures of variation for the data set. Show your work. A table has been provided to help you calculate the standard deviations. In the table round values in the last two columns to four decimal places. Report the standard deviation statistics to four decimal places.…

    • 1129 Words
    • 8 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Econ 302 Exam
    • 730 Words
    • 3 Pages

    Econ 302 Exam

    copy of the t-distribution on page 920 in the text, and the F-distribution on page 925. The formulas for…

    • 730 Words
    • 3 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Assignment 4
    • 2820 Words
    • 14 Pages

    Assignment 4

    3. In testing the difference between the means of two independent populations, if neither population is normally distributed, then the sampling distribution of the difference in means will be approximately normal provided that the sum of the sample sizes obtained from the two populations is at least 30. true…

    • 2820 Words
    • 14 Pages
    Good Essays
    Read More
  • Good Essays

    Diagnosis Congestive Heart Failure Essay
    • 639 Words
    • 3 Pages

    Diagnosis Congestive Heart Failure Essay

    3. Explain whether an independent sample or related sample t test is appropriate and why…

    • 639 Words
    • 3 Pages
    Good Essays
    Read More
  • Good Essays

    Pilgrim Case Study
    • 630 Words
    • 4 Pages

    Pilgrim Case Study

    The P-value for 1999 is 0.21, much more than 0.05, we accept the null hypothesis and…

    • 630 Words
    • 4 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Statistical Hypothesis Testing
    • 300 Words
    • 2 Pages

    Statistical Hypothesis Testing

    Suppose the obtained z was -2.5. Do you reject or fail to reject the null hypothesis? Our obtained z value of -2.5 is more extreme (in this case smaller) than our criterionz of -1.96. We reject the null hypothesis.…

    • 300 Words
    • 2 Pages
    Satisfactory Essays
    Read More
  • Powerful Essays

    TUTORIAL 8
    • 946 Words
    • 11 Pages

    TUTORIAL 8

    A sample of 40 observations is selected from one population with a population standard deviation of 5. The sample mean is 102. A sample of 50 observations is selected from a second population with a population standard deviation of 6. The sample mean is 99. Conduct the following test of hypothesis using the .04 significance level.…

    • 946 Words
    • 11 Pages
    Powerful Essays
    Read More
  • Powerful Essays

    Quality Associates, Inc.
    • 977 Words
    • 4 Pages

    Quality Associates, Inc.

    The first question required conducting a hypothesis test for each sample at the .01 level of significance. Based upon the test, determine if any corrective actions need to be taken. There are two approaches to hypothesis testing, the p-value approach and the critical value approach. The first step for the p-value approach was to calculate the mean for each sample. In order, they were:…

    • 977 Words
    • 4 Pages
    Powerful Essays
    Read More
  • Good Essays

    Difference Between Two Population Means
    • 468 Words
    • 2 Pages

    Difference Between Two Population Means

    Here, we describe estimation and hypothesis-testing procedures for the difference between two population means when the samples are dependent. In a case of two dependent samples, two data values—one for each sample—are collected from the same source (or element) and, hence, these are also called paired or matched samples. For example, we may want to make inferences about the mean weight loss for members of a health club after they have gone through an exercise program for a certain period of time. To do so, suppose we select a sample of 15 members of this health club and record their weights before and after the program. In this example, both sets of data are collected from the same 15 persons, once before and once after the program. Thus, although there are two samples, they contain the same 15 persons. This is an example of paired (or dependent or matched) samples. The procedures to make confidence intervals and test hypotheses in the case of paired samples are different from the ones for independent samples.…

    • 468 Words
    • 2 Pages
    Good Essays
    Read More
  • Good Essays

    T Test
    • 2258 Words
    • 10 Pages

    T Test

    A t-Test is any statistical hypothesis test in which the test statistics follows a Student’s t distribution if the null hypothesis is supported.…

    • 2258 Words
    • 10 Pages
    Good Essays
    Read More
  • Powerful Essays

    Slater Research Project
    • 2815 Words
    • 12 Pages

    Slater Research Project

    Porcellio Scaber is the scientific name for the slater studied. Another more commonly known name for the Porcellio Scaber is ‘Woodlice.’ Slaters are named due to their tendency to chew the wood out from just under the bark of trees and also where they are commonly found.…

    • 2815 Words
    • 12 Pages
    Powerful Essays
    Read More
  • Good Essays

    Concept of ANOVA
    • 569 Words
    • 3 Pages

    Concept of ANOVA

    The grand mean of a set of samples is the total of all the data…

    • 569 Words
    • 3 Pages
    Good Essays
    Read More
  • Satisfactory Essays

    Ecture Notes in Financial Econometrics (Msc Course)
    • 52269 Words
    • 210 Pages

    Ecture Notes in Financial Econometrics (Msc Course)

    A Statistical Tables 2 Least Squares Estimation 2.1 Least Squares . . . . 2.2 Hypothesis Testing . 2.3 Heteroskedasticity . . 2.4 Autocorrelation . . .…

    • 52269 Words
    • 210 Pages
    Satisfactory Essays
    Read More
  • Good Essays

    Imm Gsm Stats Paper
    • 974 Words
    • 4 Pages

    Imm Gsm Stats Paper

    ASSIGNMENT 2ND SEMESTER : STATISTICAL ANALYSIS (STAT) STUDY UNITS COVERED DUE DATE TOTAL MARKS : CHAPTERS 1 - 8 : 3.00 p.m. 17 AUGUST 2010 : 100…

    • 974 Words
    • 4 Pages
    Good Essays
    Read More

Related Topics