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[See Solution] The test scores on a 100 point test were recorded for 20 students. 71 93 91 86 75 73 86 82 76 57 84 89 67 62 72 77 68 65 75 84 Can you reasonably

Question: The test scores on a 100 point test were recorded for 20 students.

71 93 91 86 75 73 86 82 76 57
84 89 67 62 72 77 68 65 75 84
  1. Can you reasonably assume that these test scores have been selected from a normal population?
  2. Calculate the mean 76.65and standard deviation of the scores.
  3. If these students can be considered a random sample from a population of all students, find a 95% confidence interval for the average test score in the population.

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