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The project optimistic estimate is 10 weeks and the pessimistic estimate is 40 weeks. What is the standard deviation of the estimate?

a.4

b.5

c.6.7

d.7.5

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Question added by Muhammad Farooq , QA-QC MANAGER , AL Bawani contracting co.
Date Posted: 2016/05/16
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Mohamed Helal
by Mohamed Helal , Project Manager , GROUP CONSULT INTERNATIONAL

Thanks for invitation ..No. b- 5...........................SD = (p − o)/6

Deleted user
by Deleted user

Answer is 

B:  5

40-10/6 OR 30/6 = 5

Eng Ahmed Elsharkawy
by Eng Ahmed Elsharkawy , Civil Engineering Project Manager , Altwijry office

thanks for invition ,,,,,,,,,, my choice is option B

Ghada Eweda
by Ghada Eweda , Medical sales hospital representative , Pfizer pharmaceutical Plc.

Agree on expert answers. Thanks

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

B – By straight calculation: (40-10)/6 or 30/6 = 5

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