finding stats probabilities

Statistics
Tutor: None Selected Time limit: 1 Day

Apr 2nd, 2015

(a)

No the sample size is too small

(b) because of the word "Normal"

Yes,the distribution is normal with mean muxbar=85, sigmaxbar =1

P(81 <=xbar<=86) = p( -4 <=z<=1) = 0.8413

Apr 2nd, 2015

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Apr 2nd, 2015
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Apr 2nd, 2015
Feb 20th, 2017
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