From a normally distributed population, a simple random sample of size 30 is taken. The mean of the sample is 144 and the standard deviation of the sample is 12.

Construct a 90% confidence interval for the population mean.

A. (139.7, 148.3)

B. (140.4, 147.6)

C. (142.4, 145.6)

D. (143.3, 144.7)

Question

Mathematics

Maximo

27 April, 02:11

From a normally distributed population, a simple random sample of size 30 is taken. The mean of the sample is 144 and the standard deviation of the sample is 12.

Construct a 90% confidence interval for the population mean.

A. (139.7, 148.3)

B. (140.4, 147.6)

C. (142.4, 145.6)

D. (143.3, 144.7)

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Answers (1)

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Patty · Answer 1

From a normally distributed population, a simple random sample of size 30 is taken. The mean of the sample is 144 and the standard deviation of the sample is 12.

Construct a 90% confidence interval for the population mean.

Solution: B. (140.4, 147.6)

From a normally distributed population, a simple random sample of size 30 is taken. The mean of the sample is 144 and the standard deviation of the sample is 12.Construct a 90% confidence interval for the population mean.A. (139.7, 148.3)B. (140.4, 147.6)C. (142.4, 145.6)D. (143.3, 144.7)

From a normally distributed population, a simple random sample of size 30 is taken. The mean of the sample is 144 and the standard deviation of the sample is 12.

Construct a 90% confidence interval for the population mean.

A. (139.7, 148.3)

B. (140.4, 147.6)

C. (142.4, 145.6)

D. (143.3, 144.7)