# Another time mgt question.

Submitted by Jigga on Sat, 05/03/2014 - 20:57

If your expected value is 110 and the standard deviation is 12, which of the following is true?

There is approximately a 99 percent chance of completing this activity in 86 to 134 days.

There is approximately a 68 percent chance of completing this activity in 98 to 122 days.

There is approximately a 95 percent chance of completing this activity in 98 to 122 days.

There is approximately a 75 percent chance of completing this activity in 86 to 134 days.

The answer is B kindly show calculation steps on how they arrive at this answer. Thanks

Forums:

philstinnet

Sat, 05/03/2014 - 21:26

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## You should not have any

You should not have any problem in solving this question. I have already shown the steps in your another 'time mgt question'.

Jigga

Sun, 05/04/2014 - 00:03

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## Got it but

Got the logic but have a simple use question here how did we arrive to know we are to use the +\- 1 sigma value which is 68.27%?

Jigga

Sun, 05/04/2014 - 00:12

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## Figured it out.

Figured it out thanks. Really appreciate you are really helping me fill in my gaps.

sunku65

Sun, 05/04/2014 - 07:21

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## Jigga its simple.1σ = 68.27

Jigga its simple.

6σ = 99.99985%

Latunde

Sun, 05/04/2014 - 11:50

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## 6 sigma would be 99.9998%..

6 sigma would be 99.9998%.. So according to the steps outline that should be 12 * 6 = 72. Then the answer should be = 38 to 182 days right?

sunku65

Sun, 05/04/2014 - 13:24

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## i know that calculations.

i know that calculations. Where, am i asking about it 6 sigma is applicable to Control Charts or not.

see my another question relating to this.

thanks

philstinnet

Sun, 05/04/2014 - 17:11

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## @ Sunku,I could not find the

@ Sunku,

I could not find the question you are mentioning on 6 Sigma.

Could you please send me the link ?

Are you talking about the Sigma Shift or Fudge Factor ?

Thanks

sunku65

Mon, 05/05/2014 - 09:11

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## http://pmzilla.com/time-mgt

http://pmzilla.com/time-mgt-question

I found in andy crowe 6 sigma also applicable for control charts.

Sophia Bone

Thu, 05/22/2014 - 09:06

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## i think!

There is approximately a 99 percent chance of completing this activity in 86 to 134 days. i hope i help u

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