Answer Happy

For questions 18 through 21 refer to the following research scenario: A researcher is interested in finding out if owning a pet affects a person's health. She samples 10 senior citizens and randomly assigns them to one of two conditions - a control group (no dog) or a treatment (dog) condition. After a year of either being in the control condition or the treatment condition, she collects the number of times they had been to see the doctor for health complaints. The results are listed below: Control (No Dog) 6 5 4 Treatment (Dog) 4 3 2 2 0 3 What are the nondirectional alternative and null hypothesis? A. Alternative: There is a difference between the control and treatment groups. B. Null: There is not a difference between the control and treatment groups. C. Alternative: There is not a difference between the control and treatment groups. D.Null: There is a difference between the control and treatment groups.

Identify the inference test you would use to test this hypothesis. A. Independent samples t-test B. Single sample t-test C. Correlation or regression D. ANOVA E. Z-test F. Correlated/repeated measures t-test

Identify the critical value for testing at a = .052 tail indicating any relevant degrees of freedom that are used. Select all that apply. A. Critical value = 2.306; df = 10-2 = 8 B. Critical value=-2.306; df = 10-2 = 8 C. Critical value - 1.833; df = 10-2 = 8 D. Critical value -2.262; df = 10-1 = 9 E. Critical value = 2.262; df - 10-1 = 9 F. Critical value - 1.833; df = 10-2 = 8