Estimating a Mean: Consider the frequency
distribution for 22 test scores (it was a difficult exam).
Score
  Frequency Â
60...
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Estimating a Mean: Consider the frequencydistribution for 22 test scores (it was a difficult exam).
Score
  Frequency Â
60 −64
8
65 −69
4
70 −74
2
75 −79
4
80 −84
4
(a) The class midpoint for the first class is  .
(b) The class midpoint for the second class is  .
(c) Use the frequency table to estimate the mean score.Round your answer to 1 decimal place.
x =
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a The class midpoint for the first class is 62b The class midpoint for the second class is 67c The mean score is 702We need to compute the sample
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