PSYC FPX 4700 Assessment 4 Anova Chi Square Tests and Regression PSYC FPX 4700 Statistics for the Behavioral Sciences

Prof. Name:

Date

Problem Set 4.1: Critical Value

Criterion: Explain the relationship between k and power based on calculated k values.

Instructions: Read the following and answer the questions.

Familiarize yourself with the F-table by working through the following.

The F-table: The degrees of freedom for the numerator (k − 1) are represented across the columns, while the degrees of freedom for the denominator (N − k) are displayed across the rows in the table. Separate tables are provided for significance levels of .05 and .01.

Increasing the levels of the independent variable (k): Assume a sample size of 24 participants (N = 24). Record the critical values for the following k values:

As k increases (from 1 to 8), does the critical value increase or decrease? Based on your answer, explain how k is related to power.

Problem Set 4.2: One-way ANOVA in JASP

Criterion: Calculate an ANOVA in JASP.

Data: Use the dataset stress.jasp. This dataset records the amount of fat (in grams) consumed during a buffet-style lunch among professional bodybuilders under conditions of high, moderate, and low stress.

Instructions: Complete the steps below.

1. Download stress.jasp. Double-click the icon to open the dataset in JASP.
2. In the Toolbar, click ANOVA. From the menu that appears, select ANOVA under Classical.
3. Select Fat grams consumed and click the upper Arrow to move it to the Dependent Variable box.
4. Select Stress level and click the lower Arrow to move it to the Fixed factors box.
5. Check the Descriptive statistics box.
6. Copy and paste the output below.

Problem Set 4.3: One-way ANOVA in Excel

Criterion: Calculate an ANOVA in Excel.

Instructions: Use the data from the table below to complete the following steps:

1. In Row 1, enter High in cell A1, Moderate in cell B1, and Low in cell C1.
2. In the toolbar, click Data Analysis, select Anova: Single Factor, and click OK.
3. In Input Range: $A$1:$C$6, check the box next to Labels in First Row, then click OK.
4. Results will appear in a new sheet to the left; copy and paste the output below.

Problem Set 4.4: One-way ANOVA Results in APA Style

Criterion: Report ANOVA results in APA format.

Data: Use the results from Problem Set 4.3.

Instructions: Complete the following:

State the null hypothesis. ___

Report your results in APA format (as you might see them reported in a journal article). ___

Problem Set 4.5: Interpret ANOVA Results

Criterion: Interpret the results of an ANOVA.

Instructions: Read the following and answer the question.

Data: Life satisfaction among sport coaches. Drakou et al. (2006) examined differences in life satisfaction among sport coaches based on sex, age, marital status, and education. The results of each test are summarized in the following table, similar to how the data were presented in their article.