Score: 0 of 1 pt 8.4.28 Quesion Help A randoem sample cf size 64 is taken from a

Question

Score: 0 of 1 pt 8.4.28 Quesion Help A randoem sample cf size 64 is taken from a normal or 65 and a standand devalion ofenga nesc 7S and a standard deviation of 2 A second random sample of size 49 is taken trom a different noemal population having a mean han 10 4 Assume the difference of the Cack here lo.xew page 1of the standand normal dision abk devialion of 4 Find the probability that the sample mean competed tom the C4 measurements wis exceed the sample mean computed trom the 49 measurements by at least 8 9 bat less means to be measured to the nearest tenth. The probatary is Round to fobur decimal places as needed )

Explanation / Answer

here mean difference =75-65 =10

and mean difference =(22/64+42/49)1/2 =0.6237

for normal distribution z score =(X-)/ here mean=       = 10 std deviation   == 0.6237

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