Question

You read in the report of a psychology experiment: "Separate analyses for our two groups of 12 participants revealed no overall placebo effect for our student group, (mean=0.08,SD=0.37,t11=0.49)(mean=0.08,SD=0.37,t11=0.49) , and a significant effect for our non‑student group, (mean=0.35,SD=0.37,t11=3.25,p<0.01)(mean=0.35,SD=0.37,t11=3.25,p<0.01) ." The null hypotheses is that the mean effect is zero.

What are the correct values of the two t statistics based on the means and standard deviations? Compare each correct t‑value with the critical values in Table C. What can you say about the two‑sided P‑value in each case?

Answer 1

answered by: anonymous