Question

fill in the blank 1 point
the frequency table contains information about the pulse rates of students in a class.
from the choices below, the correct relative frequency histogram of the data is choice _.
class frequency
67 - 75 2
76 - 84 2
85 - 93 6
94 - 102 1
103 - 111 8
112 - 120 3

Explanation:

Step1: Calculate total frequency

$2 + 2+6 + 1+8+3=22$

Step2: Calculate relative frequencies for each class

For class 67 - 75: $\frac{2}{22}\approx0.09$
For class 76 - 84: $\frac{2}{22}\approx0.09$
For class 85 - 93: $\frac{6}{22}\approx0.27$
For class 94 - 102: $\frac{1}{22}\approx0.05$
For class 103 - 111: $\frac{8}{22}\approx0.36$
For class 112 - 120: $\frac{3}{22}\approx0.14$

Step3: Analyze the heights of bars in histograms

We know that the bar for the class 103 - 111 should be the tallest among all as it has the highest relative - frequency. And the bar for the class 94 - 102 should be the shortest.

Answer:

C.