Consider the relative frequency distribution given below: There were 60 numbers in the data set. How many of the number were less than 80?
A) 90
B) 80
C) 0.9
D) 54
E) 100

Question

Consider the relative frequency distribution given below:  There were 60 numbers in the data set. How many of the number were less than 80?
A) 90 
B) 80 
C) 0.9 
D) 54 
E) 100

Quizplus · Accepted Answer

In order to find the number of data points less than 80, we need to look at the cumulative frequency of all values less than 80. We can see from the relative frequency distribution that 42% of the data points are less than 80. Therefore, we can find the number of data points less than 80 by multiplying 0.42 by the total number of data points:

0.42 x 60 = 25.2

Since we cannot have a fractional number of data points, we round down to get the final answer:

25 data points were less than 80.

Consider the Relative Frequency Distribution Given Below: There Were