Question

Question9 Select one answer A researcher conducts an experiment on human memory and recruits 15 people to participate in her study. She performs the experiment and analyzes the results. She uses a t-test for a mean and obtains a p-value of o.17. Which of the following is a reasonable interpretation of her results? o points A. O This proves that her experimental treatment has no effect on memory. B. O If there is a treatment effect, the sample size was too small to detect it c. O She should reject the null hypothesis. D. O There is evidence of a small effect on memory by her experimental treatment.

Answer 1

solution:

given n=15

p value=0.17

alpha =0.05

if p value is less than alpha we reject null hypothesis and result is stastically significant

if p value is greater than alpha we fail to reject the null hypothesis and we say result is statistically nonsignificant.

here p value is greater than alpha we fail to reject null hypothesis so opition d there is a evidance of small effect on memory by her experimental treatment