times for an ambulance to respond to a medical emergency in a certain town are normally distributed with a mean of 450 seconds and a standard deviation of 50 seconds. There were 97 emergencies in the town

in about how many emergencies would response times be between 400- 500 seconds?

A.66

B.31

C.47

D.33

Nuggetguy Apr 10, 2019

#1**+4 **

One standard deviation above and below the mean encompasses 68%

68% x 97=~~66

When I was in school, we were taught to remember the standard bell curve values like the one below:

ElectricPavlov Apr 10, 2019

#1**+4 **

Best Answer

One standard deviation above and below the mean encompasses 68%

68% x 97=~~66

When I was in school, we were taught to remember the standard bell curve values like the one below:

ElectricPavlov Apr 10, 2019