A group of 50 biomedical students recorded their pulse rates by counting the number of beats for 30 seconds and multiplying by 2.

a. Why are all of the measurements even numbers?
b. Draw a stem and leaf plot to describe the data, splitting each stem into two lines.
c. Construct a relative frequency histogram for the data.
d. Write a short paragraph describing the distribution of the student pulse rates.

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80 70 88 70 84 66 84 82 66 42 52 72 90 70 96 84 96 86 62 78 60 82 88 54 66 66 80 88 56 104 84 84 60 84 88 58 72 84 68 74 84 72 62 90 72 84 72 110 100 58