Question

Given the following data set of test #1 scores.

78 80 68 56 76 78 74 90 96 60 98 66 100 76 64 82 62 72 78 74 90 90 68 72 82 72 78 54 62 72 72 78 65 51 34 82

a. Construct a stem and leaf plot.

b. Construct a frequency distribution with that has class width of 12, and the lower class limit of the first class is 34.

c. Construct a frequency polygon for part(b).

Answer 1

From the given data we have:

34,51,54,56,60,62,62,64,65,66,68,68,72,72,72,72,72,74,74,76,76,78,78,78,78,78,80,82,82,82,90,90,90,96,98,100(in ascending order)

a)stem and leaf plot

b) Frequency distribution with class width of 12:

c)Frequency polygon for part(b).