A population has a mean of49and a standard deviation of24. If a random sample of30is taken, what is the probability that the sample mean is greater than58?

P(x58)=

A population has a mean of51and a standard deviation of26. If a random sample of32is taken, what is the probability that the sample mean is less than55?

P(x<55)=

A population has a mean of48and a standard deviation of20. If a random sample of37is taken, what is the probability that the sample mean is between51and54?

P(51

Use the following information to construct the confidence intervals specified toestimate 95% confidence interval forx=41,=8.5,andn=69.

Lower Confidence Limit (L.C.L)=

Upper Confidence Limit (U.C.L)=

Use the following information to construct the confidence intervals specified toestimate

98% confidence interval forx=44,=5.1,andn=62.

Lower Confidence Limit (L.C.L)=

Upper Confidence Limit (U.C.L)=

If a random sample ofn=41items producesx=146ands=23.4, what is the98%confidence intervaltoestimate.

Lower Confidence Limit (L.C.L)=

Upper Confidence Limit (U.C.L)=