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anonymous
 one year ago
Find the probability of obtaining 25 samples with a mean height ranging from 60 to 63 inches from a normal population with a mean of 61 and a standard deviation of 5 inches?
anonymous
 one year ago
Find the probability of obtaining 25 samples with a mean height ranging from 60 to 63 inches from a normal population with a mean of 61 and a standard deviation of 5 inches?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0z = (XMean) / (SD/sqrt n) z1 = (6061) / 5/sqrt 25 =  1 z2 = (6361) / (5/sqrt 25) = + 2 The area under the standard normal curve between these two z values indicates the required probability. Required probability = P(60 < Xbar < 63) = P( 1 < z < 2) = 0.3413 (area corresponding to z1 being ve lies on the left side of mean) + 0.4772 (area corresponding to z2 being +ve lies on the right side of mean) Is the answer 0.8185 ?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0I think so. But its been a long time.. I'll look something up.

nincompoop
 one year ago
Best ResponseYou've already chosen the best response.0do you have your ztable values?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the answer is correct? yay. Thankyouuu yeap. But I'm just confirming

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0yes  i just looked up some old notes. Stats never came easy to me also.
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