Overview
Test the hypothesis that African Americans are significantly different from whites on their level of confidence in clergy. Set alpha=.05.
Computing T-Tests
Click Analyze
Click Compare means
Click Independent samples T-Test
Select appropriate variable from the dialog box
Click the top arrow to move variable to the Test variables box
Select appropriate variable from the dialog box
Click the bottom arrow to move variable to the Grouping variables box
Click Define groups
Type the appropriate values for group1 and group2 (Type 1 and then type 2)
Click Continue
Click Ok
- State the assumptions (Hint: Refer to the notes from Chapter 9)
- State the null and the alternate hypotheses (Hint: Refer to the notes from chapter 9)
- Decision to reject or not to reject and conclusion. Alpha level is .05. Show your work by comparing the p value with the alpha level. (Hint: See below)
- Which group has more confidence in clergy? Explain.
Using ONEWAY procedure, test for a statistically significant difference between a woman’s degree (DEGREE) and number of children (CHILDS). Using degree as the independent variable and number of children as the dependent variable, we want to assess whether there is a relationship between educational attainment and number of children.
Click data
Click select cases
Select sex
Select if condition is satisfied
Select sex=2
Click Continue
Click OK
Computing One-Way analysis:
Click analyze
Click compare means
Click one-way ANOVA
Move the dependent variable from the dialog box to the dependent list
Move independent variable from the dialog box to the factor list
Click posthoc
Click Tukey’s-b
Click continue
Click OK
- State the assumptions (Hint: Refer to the notes from chapter 10)
- State the null and the alternate hypotheses (Hint: Refer to the notes from chapter 10)
- Report the observed value of F (Hint: the number is in your output).
- Decision to reject or not to reject and conclusion (See below for comparing p value with alpha level). Alpha level is .05. Show your work by including the p value and alpha level.
- Which groups are significantly different from one another? (Hint: Look at the Post Hoc table)
- What are the mean ages for the different degree levels? (Hint: Look at the Post Hoc table)
Follow these instructions to make a decision and conclusion:
If p value < alpha level Reject the null hypothesis and conclude that there is a significant difference
If p value > alpha level Fail to reject the null hypothesis and conclude there is not a significant difference.