Statistics questions

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I’m stuck on a Statistics question and need an explanation.

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Final Answer

sigma(std dev) 3
mu(mean) 25  
z value for 4 0.166667 (x-mu)/(sigma)
z value for 8 0.666667 (x-mu)/(sigma)
P(z<0.167) 0.630559 Use normdist functin in excel
P(z<0.667) 0.908789 Use normdist functin in excel
P(26<x<29) 0.27823  

Mayur (684)
Boston College

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