Question

For which of the following situations is the dependent groups t-test appropriate (if not appropriate, why?)
a.   The IV is presence or absence of massage directed to comatose patients (same patients with and without conversation); the DV is the patients’ systolic blood pressure.

b.   The IV is minor surgery (out-patient clinic vs hospital); the DV is the rate of infection 48 hours after surgery.

c.   The IV is time since receiving a complete physical from a primary care provider(measured at 6 months and 18 months); the DV is body mass index (BMI).

d.   The IV is anxiety after cancer diagnosis (pre biopsy vs during biopsy vs post biopsy) in the same women over time; the DV is attitudes toward cancer (measured in a survey score 1-20).

Answer 1

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

dependent groups t-test appropriate

................

b)

no dependent groups:

AS the two groups taken are from different population

.....

c)

c.   The IV is time since receiving a complete physical from a primary care provider(measured at 6 months and 18 months); the DV is body mass index (BMI).

dependent groups t-test appropriate

.......

d)

not dependent groups

........

THANKS

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