Question

An Independent Samples T Test is used to make an inference about whether two groups in the population have different averages on some quantitative measure or dependent variable. This test could be used to compare the average annual earnings of High School graduates, compared to Community College graduates For this potential research question, answer the following questions. Please use only numeric values in your answers to questions 1, 2 and 3 and a word to answer question 4 1) According to the Null Hypothesis, the difference in earnings would be 2) With an alpha of.05, and 2,000 cases, what would the critical value of t be? 3) What is the risk of Type 1 error in this test? 4) If the Alternative Hypothesis is that Community College graduates earn more than High School graduates, is this hypothesis directional or non-directional?

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Answer #1

1) ans-> 0

2) ans-> critical value of t will be 0.05.2000-1 t0.05.1999 1.64562

3) ans-> 0.05

4) ans-> directional

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