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The number of customers at your company's store on a given day has a bell-shaped normal distribution with a mean of 60 and a standard deviation of 10. What percentage of days do you expect to have between 50 and 70 customers?

 Feb 26, 2020
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Since one standard deviation  = 10

 

Then  the given range of 50-70 falls within   1 standard  deviation  on  either side  of  the mean

 

Approxinatelt  34.13%   of the  measurements fall  within one standard deviation on either side of the mean

 

So  2  [34.13% ]  =  64.26%  of the days have  between 50  and 70  customers

 

 

cool cool cool

 Feb 26, 2020

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