What is Beta Distribution estimate, what is the answer for this question

Estimating

Anonymous

Activity A is 5 Days, Activity B is 6 Days, Activity C is 9 Days, Activity D is 7 Days and Activity E is 7 Days.

A) 5, B) 6, C) 7 and D) 8

Posted: Mar 17, 2018 6:59 PM

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Kevin Drake Perth, Western Australia, Australia

Am I missing some information here?

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1 reply by Sridhar Raju Mahali

Mar 19, 2018 9:53 PM

Sridhar Raju Mahali

...

None is missing, the question is very accurate and complete, as it is. Even I too surprised what formula needs to be applied for the options given, Triangular or Beta. Both of these standards doesn't fit for the question asked. I did some research from search engines and found there are some clues about probability of occurrence using MS excel and some other tools but couldn't understand much, so thought of like post it and get help from experts if anyone knows it.

Posted: Mar 17, 2018 8:51 PM

Najam Mumtaz Retired Lahore, Punjab, Pakistan

Triangular and Beta distribution are used to come with an estimate of something (measurable). Both estimation techniques uses Optimistic(O), Most likely(M) and Pessimistic(P) estimates with Beta distribution giving more weightage to Most likely estimate.

Triangular Distribution= (O+M+P)/3
Beta Distribution= (O+4M+P)/6

The question doesn't talk anything about probability of occurrence of an activity or it's duration. Rather it says definite days for each activity. It seems incomplete.....

Posted: Mar 17, 2018 10:13 PM

Sridhar Raju Mahali Pa, United States

Mar 17, 2018 8:51 PM

Replying to Kevin Drake

...

Am I missing some information here?

Posted: Mar 19, 2018 9:53 PM (Updated by author: Mar 19, 2018 9:54 PM)

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What is Beta Distribution estimate, what is the answer for this question

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