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Estimating a Mean: Consider the frequency distribution for 22 test scores (it was a difficult exam). Score   Frequency   60...

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Statistics

Estimating a Mean: Consider the frequencydistribution for 22 test scores (it was a difficult exam).

Score  Frequency  
60 −648
65 −694
70 −742
75 −794
80 −844

(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 =

Answer & Explanation Solved by verified expert
3.9 Ratings (792 Votes)
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    See Answer
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