credit hours number of students 3 to 5 4 5 to 7 5 7 to 9...

credit hours	number of students
3 to 5	4
5 to 7	5
7 to 9	9
9 to 11	4
11 to 13	3

a) Plot the histogram, frequency polygon and cumulative frequency polygon.

b) Compute the sample mean, sample variance and sample standard deviation

c) estimate the median from cumulative frequency distribution and mode from the histogram.

d) is this distribution symmetrical or skewed?

e) What percent of the student course load is expected to fall with in 3 standard deviations from the mean?

Solutions

Expert Solution

milcah answered 1 month ago

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