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If you know that the expected value is 500 and the standard deviation is 12, you can say with approximately a 95% confidence rating which of the following?

 

A. The activity will take from to days.

B. The activity will take from to days.

C. The activity will take from to days.

D. The activity will take from to days.

 

 

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Question added by Muhammad Farooq , QA-QC MANAGER , AL Bawani contracting co.
Date Posted: 2017/02/03
hisham abu dagga
by hisham abu dagga , Project Manager / مدير مشاريع , مؤسسة عبدالكريم العواض للمقاولات

95% means +/-2 sigma, the activity will take between 500+12*2 and 500-12*2, D is the answer

The figures in question do not exist ??

 

But here's the equation

Muhammad Farooq
by Muhammad Farooq , QA-QC MANAGER , AL Bawani contracting co.

Kashinath Bansode  is given correct Answer

Explanation:

There is a 95 percent probability that the work will finish within plus or minus two standard

deviations. The expected value is 500, and the standard deviation times 2 is 24, so the activity will

 

take from 476 to 524 days.

Kashinath Bansode
by Kashinath Bansode , United Al Darwish Group of Companies Doh

There is 95% probability that the work will finish within plus or minus two standard deviation. The expected value is 500, & the standard deviation time 2 is 24, so the activity will take from 476 to 524 days.

Krishna   KHASANIS  PMP
by Krishna KHASANIS PMP , Project Manager-Electrical , Larsen & Toubro Ltd, P T & D (International)

Simple , activity will take from 488 days ( 500 - 12 ) to 512 days ( 500 + 12 )  & thanks for the invite.

Thanks for the invitation. Sorry I do not know the exact answer.

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