Question

1. the resting pulse rates were recorded for 16 boys in gym class before they exercised. the line plot here shows the results. (3 points)

how many boys had a pulse rate of at most 82?
what is the range of the pulse rates?
how many boys had a pulse rate of 83?
how many boys had a pulse rate over 81?

Explanation:

Step1: Count boys with pulse at most 82

Count the number of 'X's at 79, 80, 81, 82. There are 2 + 3+ 1+ 3 = 9.

Step2: Find range of pulse rates

Range = maximum - minimum. Maximum is 85, minimum is 79. So range is 85 - 79 = 6, and the range is from 79 to 85 (f).

Step3: Count boys with pulse 83

Count the number of 'X's at 83. There are 4.

Step4: Count boys with pulse over 81

Count the number of 'X's at 82, 83, 85. There are 3+4 + 2= 9.

Answer:

How many boys had a pulse rate of at most 82? b. 9
What is the range of the pulse rates? f. 79 to 85
How many boys had a pulse rate of 83? j. 4
How many boys had a pulse rate over 81? h. 9