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University of Phoenix Material                           

Comparing Means Worksheet 

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The following questions require that you access data from Using SPSS for Windows and Macintosh. This data is available under Resources in the Textbook Resources document. The team must work together to solve these questions

T

he following questions require that you access data from Using SPSS for Windows and Macintosh. This data is available under Resources in the Textbook Resources document. The team must work together to solve these questions.

1. Review the one sample t-test instructional video before completing this problem. The data set for this problem can be found through the Pearson Materials in the Textbook Resources link. The data for this question is in the data file named Lesson 22 Exercise File 1. John is interested in determining if a new teaching method, the involvement technique, is effective in teaching algebra to first graders. John randomly samples six first graders from all first graders within the Lawrence City School System and individually teaches them algebra with the new method. Next, the pupils complete an eight-item algebra test. Each item describes a problem and presents four possible answers to the problem. The scores on each item are 1 or 0, where 1 indicates a correct response and 0 indicates a wrong response. The IBM® SPSS® data file contains six cases, each with eight item scores for the algebra test.

Conduct a one-sample t-test on the total scores. On the output, identify the following:

a. Mean algebra score

b. T value

c. P value

2. Review the one-way ANOVA instructional video before completing this problem. The data set for this problem can be found through the Pearson Materials in the Textbook Resources link. The data for this question is in the data file named Lesson 25 Exercise File 1. Marvin is interested in whether blonds, brunets, and redheads differ with respect to their extrovertedness. He randomly samples 18 men from his local college campus: six blonds, six brunets, and six redheads. He then administers a measure of social extroversion to each individual.

Conduct a one-way ANOVA to investigate the relationship between hair color and social extroversion. Conduct appropriate post hoc tests. On the output, identify the following:

a. F ratio for the group effect

b. Sums of squares for the hair color effect

c. Mean for redheads

d. P value for the hair color effect

From Green & Salkind (2011). Copyright © 2012 Pearson Education. All Rights Reserved.