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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

 Apr 10, 2019
edited by Nuggetguy  Apr 10, 2019

Best Answer 

 #1
avatar+20217 
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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:

 Apr 10, 2019
edited by ElectricPavlov  Apr 10, 2019
 #1
avatar+20217 
0
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
edited by ElectricPavlov  Apr 10, 2019
 #2
avatar+1015 
-2

Great Job!!!! 

(: 

 

ElectricPavlov
 

Nickolas  Apr 10, 2019

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