PART III. Hypothesis Testing

5. Conduct an Independent Samples t Test (a test of mean differences) to investigate whether the difference is significant. Use the Independent Samples t Test command with EDUC as the dependent variable (test variable) and RACE as the grouping variable. Define groups so that Group 1 = 1 and Group 2 = 2 (1 = White; 2 = Black; the category 3 ["other"] will be ignored). Set the alpha level at .01.

1. State the null and research hypotheses:

H₀:

H₁:

1. Is the F statistic for Levene's test significant?

a. What is the alpha level for the t-test?

b. Obtained t-value:

c. Significance level for the t-test:

d. Decision rule:

If the significance level of the obtained t statistic is greater than ____ (alpha level), we fail to reject the null hypothesis.

If the significance level of the obtained t statistic is equal to or less than ____ (alpha level), we reject the null hypothesis.

f. Decision: Since the significance level of the obtained t statistic is _____ and it is __________(greater or less) than ____ (alpha level), we ________(reject or fail to reject) the null hypothesis.

g. Interpretation/conclusion: