Consider the following frequency distribution: Class ...... Frequency 10 up to 20 ... 12 20 up to

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Consider the following frequency distribution:
Class
...... Frequency
10 up to 20 ... 12
20 up to 30 .... 15
30 up to 40 ... 25
40 up to 50 ... 4

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?

Distribution
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