Assume a clinical researcher examined the effectiveness of a relaxation techniques for long term reductions in blood pressure and reported the following research notation t(5) = 3.17, p <.05. Should Cohen's d should be calculated?
Group of answer choices
a.) Yes, the result was statistically significant.
b.) No, the result was not statistically significant.
c.) Yes, the result was not statistically significant but we check effect size anyway.
Question 2
Assume a health psychologist wanted to know whether a nicotine cessation program significantly impacted the number of cigarettes smoked per week. She recruited smokers and recorded how many cigarettes they smoked before the program and then recorded how many cigarettes they smoked after the cessation program. Identify the correct null and alternative hypotheses for this study:
Group of answer choices
Null: µ = M; Alternative: µ ≠M
Null: µ1 - µ2 = 0; Alternative: µ1 - µ2 ≠0
Null: M1 – M2 = 0; Alternative: M1 – M2 ≠0
Null: µD = 0; Alternative: µD ≠0
Question 3
A primary advantage of the repeated measure t-test is that it reduces error and variance by removing individual differences. This happen because:
Group of answer choices
a.) Each person serves as his or her own control
b.) Subtracting time 2 (x2) from time 1 (x1)
c.) Difference scores that are closer together produce smaller variance
d.) All of the above.