Question: 5: Tin collects data from a random sample of 52 psychology honours thesis students to find out if taking a theatre course improves their public

5: Tin collects data from a random sample of 52 psychology honours thesis students to find out if taking a theatre course improves their public speaking skills. Typically, thesis students get a mean grade of =7.8 ( = 3) for their thesis proposal presentations. Tin's sample of students who took the theatre course, however, get a mean grade of 8.3. The percentile rank for Tin's sample is

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