A researcher has collected some data on the amount of time in seconds (to the nearest 0.1 second) that it took trained rats to run through a maze. The data is shown in the frequency distribution of grouped scores that follows. The relative frequency for the interval 5.2-6.6 is _________.
A) 0.03
B) 0.14
C) 0.11
D) 13

Question

A researcher has collected some data on the amount of time in seconds (to the nearest 0.1 second) that it took trained rats to run through a maze. The data is shown in the frequency distribution of grouped scores that follows.  The relative frequency for the interval 5.2-6.6 is _________.
A) 0.03 
B) 0.14 
C) 0.11 
D) 13

Quizplus · Accepted Answer

To find the relative frequency for the interval 5.2-6.6, we need to find the sum of the frequencies in that interval and divide it by the total number of observations.

The frequency for the interval 5.2-6.6 is 28.

The total number of observations is 200.

So the relative frequency for the interval 5.2-6.6 is:

28/200 = 0.14

Therefore, the best choice is B.

A Researcher Has Collected Some Data on the Amount of Time