Question

A university counselor believes that hypnosis is more effective than the standard treatment given to the students who have high test anxiety. To test his belief, he randomly divides 22 students with high test anxiety into two groups. One of the groups receives the hypnosis treatment, and the other group receives the hypnosis treatment, and the other group receives the standard treatment. When the treatments are concluded, each student is given a test anxiety questionnaire. High scores on the questionnaire indicate high anxiety. The following are the results: Hypnosis Treatment 20 21 33 40 24 43 48 31 22 44 30 Standard Treatment 42 35 30 53 57 26 37 30 51 62 59 Using the Mann-Whitney U Test and α = 0.05 1 tail, what do you conclude?

          A university counselor believes that hypnosis is more effective
than the standard treatment given to the students who have high
test anxiety. To test his belief, he randomly divides 22 students
with high test anxiety into two groups. One of the groups receives
the hypnosis treatment, and the other group receives the hypnosis
treatment, and the other group receives the standard treatment.
When the treatments are concluded, each student is given a test
anxiety questionnaire. High scores on the questionnaire indicate
high anxiety. The following are the results:
Hypnosis Treatment 20 21 33 40 24 43 48 31 22 44 30
Standard Treatment 42 35 30 53 57 26 37 30 51 62 59 
Using the Mann-Whitney U Test and α = 0.05 1 tail, what do you
conclude?

Added by Antonio H.

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