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# Using Statistical Software to Solve ANOVA

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#### Solution Preview

Step-by-step Guide

1. Which group(s) chooses healthy items when eating out?

DV: OUTTVH - When I eat out, I choose the healthiest item
IV: AgeYMO- Age Group
Groups were divided by Age- Young, Middle, Older and coded as follows:
Young=0
Middle= 1
Older= 2

Follow these steps to get the mean of each group:
a. To get the mean of the Young age group, you have to filter the AgeYMO variable. To do this, go to Data, Select Data on the Select Cases interface click If Condition is Satisfied. Click the If... button. Select the AgeYMO and type the code for Young which is 0. This will appear as AgeYMO=0. Click the Continue button (in the "Select cases if" interface). Click again the Continue button (in the "Select cases" interface).

You will note in the Data view that only cases that are classified as "Young" are selected.

In this case you can compute exclusively the mean of this group. Go to Analyze, Descriptive Statistics, Descriptives move the OUTTVH variable to the variables box. Be sure to click the Option button and select Mean. Click the Continue button. Click the OK button.

b. To get the mean of the Middle age group, you have to filter the AgeYMO variable to select only that particular age group.
To do this, go to Data ? Select Data? on the Select Cases interface click If Condition is Satisfied. Click the If... button. Select the AgeYMO and type the code for Middle which is 1. This will appear as AgeYMO=1. Click the Continue button (in the "Select cases if" interface). Click again the Continue button (in the "Select cases" interface).

You will note in the Data view that only cases that are classified as "Middle" are selected.

In this case you can compute the mean of this group. Go to Analyze ? Descriptive Statistics ? Descriptives ? move the OUTTVH variable to the variables box. Be sure to click the Option button and select Mean. Click the Continue button. Click the OK button.

c. To get the mean of the Older age group, you have to filter the AgeYMO variable to select only that particular age group.
To do this, go to Data ? Select Data? on the Select Cases interface click If Condition is Satisfied. Click the If... button. Select the AgeYMO and type the code for Older which is 2. This will appear as AgeYMO=2. Click the Continue button (in the ...

#### Solution Summary

This solution uses appropriate statistical software to solve analysis of variance (ANOVA). The step-by-step solutions are contained in the attached files.

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## Using ANOVA in Statistical Analysis

See the attached file for data.

This week, you will explore the hypothesis that recall will vary as a function of stress levels.

Conduct an ANOVA comparing participants' recall at Time 1 across all three stress-level conditions (low, medium, and high).

Conduct post hoc tests if needed, using the Tukey method.

Move your output into a 1- to 2-page Microsoft Word document and write a short, APA-formatted interpretation of the results.

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