National UniversityBST 322 1) For which of the following situations is the independent groups t-test appropriate (if inappropriate, why?)

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National UniversityBST 322

1) For which of the following situations is the independent groups t-test appropriate (if inappropriate, why?). Remember to consider all relevant assumptions for this t-test. 

a. The independent variable (IV) is infant birth weight at one week (normal vs. high); the dependent variable (DV) is resting heart rate.

B The IV is radiation treatment on throat cancer patients (after a low dose and then a high dose treatment given to the same patients); the DV is white blood cell count.

c. The IV is infant birth weight (low vs. normal birth weight); the DV is number of days absent from school in first grade.

d. The IV is gender (male vs. female); the DV is compliance vs. noncompliance with a medication regimen.

e.The IV is marital status (single vs. divorced vs. married); the dependent variable is happiness measured on a scale from 1 to 50

2) For which of the following situations is the dependent groups t-test appropriate (if not appropriate, why?). Remember to consider all relevant assumptions for this t- test.

a. The IV is presence or absence of conversation directed to comatose patients (same patients with and without conversation); the DV is the patients’ intracranial pressure.

b. The IV is role (one group is self-managed patients, in the other the patients are managed by a nurse); the DV is functional ability of the patient 48 hours after surgery (interval/ratio measure).

c. The IV is time since incarceration (1 months vs. 3 months vs. 6 months); the DV is body weight.

d. The IV is menopausal state (pre vs. post, using different people); the DV is attitudes toward menopause (interval/ratio measure).

e. The IV is nap therapy for narcoleptics (before vs. after treatment); the DV is unplanned naps the following week (had unplanned vs. didn’t have unplanned nap).