QUESTION 2 You may need to use the appropriate appendix table or technology to answer this question. A simple random sample of 90 items resulted in a sample mean of 60. The population standard...

QUESTION 2

You may need to use the appropriate appendix table or technology to answer this question.

A simple random sample of 90 items resulted in a sample mean of 60. The population standard deviation is

? = 10.

(a)

Compute the 95% confidence interval for the population mean. (Round your answers to two decimal places.)

(b)

Assume that the same sample mean was obtained from a sample of 180 items. Provide a 95% confidence interval for the population mean. (Round your answers to two decimal places.)

(c)

What is the effect of a larger sample size on the interval estimate?

A larger sample size does not change the margin of error.A larger sample size provides a larger margin of error. A larger sample size provides a smaller margin of error.

Jun 07, 2022

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QUESTION 2 You may need to use the appropriate appendix table or technology to answer this question. A simple random sample of 90 items resulted in a sample mean of 60. The population standard...

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