The average middle-distance runner at a local high school runs the mile in 4.5 minutes, with a standard deviation of 0.3 minute. Find the percentage of a runners that will run the mile in less than 4 minutes?

A. 45.22%

B. 15.87%

C. 7.15%

D. 4.75%

Question

The average middle-distance runner at a local high school runs the mile in 4.5 minutes, with a standard deviation of 0.3 minute. Find the percentage of a runners that will run the mile in less than 4 minutes?
 









A. 45.22%
 









B. 15.87%
 









C. 7.15%
 









D. 4.75%

anonymous · Answer

You might also want someone to check this over again because I could be wrong, but I am thinking it is B. 15.87%.

anonymous · Answer

thanks(:

anonymous · Answer

No problem (: If I am wrong, I am super sorry! But I just wanted to try and help you out! (:

zarkon · Answer

I guess you are assuming normality...then in that case the answer is D

anonymous · Answer

I must've solved the problem wrong then. I divided them. My bad! I am really sorry!