Sciences PSY/315 Version 2 Statistical Reasoning in Psychology Copyright © 2010‚ 2009‚ 2006 by University of Phoenix. All rights reserved. Course Description This is an introductory course in applied statistics‚ with particular emphasis in psychology. Both descriptive and inferential statistics are included. In addition‚ this course provides the basic statistical background and understanding needed. Policies Faculty and students/learners will be held responsible for understanding and adhering
Premium Statistical hypothesis testing Statistics Statistical inference
cell phone bill in this city is μ = $42 Population proportion Example: The proportion of adults in this city with cell phones is π = 0.68 States the claim or assertion to be tested Is always about a population parameter‚ not about a sample statistic Is the opposite of the null hypothesis e.g.‚ The average diameter of a manufactured bolt is not equal to 30mm ( H1: μ ≠ 30 ) Challenges the status quo Alternative never contains the “=”sign May or may not be proven Is generally the hypothesis
Premium Statistics Arithmetic mean Statistical hypothesis testing
elementary class to a stay at home parent balancing the checkbook is in constant contact with numerical information. Statistics is used not only by businesspeople; we all also apply statistical concepts in our lives‚ (Lind‚ Marchal‚ Wathen‚ 2011). The different type of numerical data is separated into different sections of information to make it easier to interpret. Statistics is the science of data. It involves collecting‚ classifying‚ summarizing‚ organizing‚ analyzing‚ and interpreting numerical
Premium Statistics Data
might go wrong 5) Probability can be fun and challenging (See Monty Carlo Paradox)Statistics are sets of mathematical equations that are used to analyze what is happening in the world around us. You’ve heard that today we live in the Information Age where we understand a great deal about the world around us. Much of this information was determined mathematically by using statistics. When used correctly‚ statistics tell us any trends in what happened in the past and can be useful in predicting what
Premium Weather forecasting Prediction Forecasting
INTRODUCTION TO Statistics 1.1 WHAT IS STATISTICS? The word statistics derives from classical Latin roots‚ status which means state. Statistics has become the universal language of the sciences. As potential users of statistics‚ we need to master both the “science” and the “art” of using statistical methodology correctly. These method include: Carefully defining the situation Gathering data Accurately summarizing the data Deriving and communicating meaningful conclusions
Premium Level of measurement Statistics
CHAPTER 8 Introduction to Hypothesis Testing 8.1 Inferential Statistics and Hypothesis Testing LEARNING OBJECTIVES 8.2 Four Steps to Hypothesis Testing After reading this chapter‚ you should be able to: 8.3 Hypothesis Testing and Sampling Distributions 8.4 Making a Decision: Types of Error 8.5 Testing a Research Hypothesis: Examples Using the z Test 8.6 Research in Focus: Directional Versus Nondirectional Tests 8.7 Measuring the Size
Premium Statistical hypothesis testing Statistical significance Null hypothesis
A point estimation is a sample statistic that gives a good guess about a population parameter. In the same way‚ a point estimate of the mean overpayment is simply a good guess about what the average overpayment for the population is. Investigating all 1‚000 claims and obtaining the overpayment amount for each would either be impractical‚ unfeasible or both. Thus‚ the auditor deems a sample size of 50 claims to be adequate and sufficiently representative of the entire population. The mean overpayment
Premium Arithmetic mean Statistics Sample size
assigned to find interval estimates for a population mean and a population proportion. b) Is finding an interval estimate an example of inferential or descriptive statistics? Explain. It is an interval estimate is an example of inferential statistics‚ as an estimate of the value of the population parameter is made based on sample statistics. c) An interval estimate (23.8‚ 30.6) is determined for the mean age of NSCC students. Identify the point estimate and the margin of error of the interval estimate
Premium Statistical inference Statistical hypothesis testing Confidence interval
PROJECT PART B: Hypothesis Testing and Confidence Intervals Math 533 Applied managerial Statistics. Instructor: Mr. Patrick Mayers. April 12‚ 2015 Guillermo H. Quintela. a. The average (mean) sales per week exceeds 41.5 per salesperson. The Null Hypothesis: The average (mean) sales per week is greater than or equal to 41.5 per salesperson. Ho:µ >= 41.5 The alternate Hypothesis: The average (mean) sales per week is less than or equal than 41.5 per salesperson. Ha:µ < 41.5 For a significance
Premium Statistical hypothesis testing Statistical inference Statistics
Gloria Vandello May 12‚ 2013 How are statistics used in your workplace? Statistics are used in the entire hospital‚ where I work. Before taking this class I didn’t gave it much thought of just how much statistics are being used in every floor. I guess I always believed that the word “statistics” was mainly used in the research department and that is where it should stay since it didn’t seem interesting enough to study. Now that I’m taking this class statistics seem to be all over my work place‚ just
Premium Statistics Confidence interval Statistical hypothesis testing