Consider the following frequency distribution:

a. Construct a relative frequency distribution. Graph a relative frequency histogram.

b. Construct a cumulative frequency distribution and a cumulative relative frequency distribution.

c. What percent of the observations are at least 30 but less than 40? What percent of the observations are less than 40? R-69

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Class Frequency 10 up to 20 12 20 up to 30 15 30 up to 40 25 40 up to 50 4