In a 5-kilometer race, the average finishing time was 32 minutes, with a standard deviation of 2 minutes. What percentage of the racers finished in 28 minutes or less?

Question

Kasey Mcknight

Mathematics

27 October, 07:29

In a 5-kilometer race, the average finishing time was 32 minutes, with a standard deviation of 2 minutes. What percentage of the racers finished in 28 minutes or less?

+2

Answers (1)

Know the Answer?

Nathalia Sandoval · Answer 1

0% of the racers finished in 28 minutes or less

Step-by-step explanation:

There is the need to understand the meaning of the standard deviation in this question.

The standard deviation expresses by how much the finishing time differed from the mean/average time. So, it tells us that the time range for all of the racers can be written as Mean ± Standard Deviation = 32 ± 2 minutes = (32 - 2) to (32 + 2) = 30 to 34 minutes.

So, all of the racers finished in 30 minutes or more, and no one finished in less than thirty minutes.

The questions asked to know o those who finished in 28 minutes or less, and that does not exist in this given data, so 0% of the racers finished in 28 minutes or less