Module C - Two Times

Learning Guide

This module will begin with a review of previous material. As you move through the content you will be introduced to appropriate methods of analyzing data that contains two times such as pre and post data. We will compare differences between groups and times. How differences between two times are calculated will be presented in Excel.
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Objectives

By the end of the lesson on difference two groups, the student should be able to:

Competent to explain study design.
Correctly interpret test assumptions.
Competent in running data analysis.
Selects appropriate test statistic.
Accurately interprets data output.
Accurately summarizes results.
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Readings

Chapter 6 (pages 127-144). The analyses of two times using at least ordinal data are explained in this chapter. Assumptions are identified for the two tests discussed in this chapter, paired t-test and Wilcoxon Matched Pairs Signed Rank Test.
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Learning Activities

Powerpoint. View and/or print the following Powerpoint slides: Two Times Part 1 and Two Times Part 2. The below movies correspond to the slides. The content for this module includes: process of analysis of two times including Paired t test and Wilcoxon, introduction to correlation, and hypothesis testing.
Movies. View movie links: Difference Two Times Part 1 and Difference Two Times Part2.
Excel. The following are Excel workbook files to be used in teaching and for assignment completion: Two Times.
The two tests to review are: Paired t-test and Wilcoxon Signed Rank. Use Excel files for calculating and reviewing.
A review of the content for these three modules is included here. All content to be tested can be found in this review document.
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Assignments

Answer the Review questions in Chapter 6: 1-10 and Choosing the Best Statistical Test questions: 1-10. Critical Thinking Review question 2.
Use the data below to complete the Excel document. Fill in the data and analyses for the Excel document completely.

	BDI1_PRE	BDI1_Post
1	22	22
2	22	22
3	23	21
4	24	23
5	22	23
6	20	15
7	22	21
8	21	20
9	23	21
10	21	15
11	22	20
12	23	21
13	20	22
14	24	24
15	20	19