Marty Rowatti recently assumed the position of director of the YMCA of South Jersey. He would like some current data on how long current members of the YMCA have been members. To investigate, suppose he selects a random sample of 40 current members. The mean length of membership for the sample is 8.32 years and the standard deviation is 3.07 years. a. What is the mean of the population? (Round your answer to 2 decimal places.) Population mean b. Develop a 90% confidence interval for the population mean. (Round your answers to 2 decimal places.) Confidence interval for the population mean is between and years.

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Marty Rowatti recently assumed the position of director of the YMCA of South Jersey. He would like some current data on how long
current members of the YMCA have been members. To investigate, suppose he selects a random sample of 40 current members. The
mean length of membership for the sample is 8.32 years and the standard deviation is 3.07 years.
a. What is the mean of the population? (Round your answer to 2 decimal places.)
Population mean
b. Develop a 90% confidence interval for the population mean. (Round your answers to 2 decimal places.)
Confidence interval for the population mean is
between
and
years.
Transcribed Image Text:Marty Rowatti recently assumed the position of director of the YMCA of South Jersey. He would like some current data on how long current members of the YMCA have been members. To investigate, suppose he selects a random sample of 40 current members. The mean length of membership for the sample is 8.32 years and the standard deviation is 3.07 years. a. What is the mean of the population? (Round your answer to 2 decimal places.) Population mean b. Develop a 90% confidence interval for the population mean. (Round your answers to 2 decimal places.) Confidence interval for the population mean is between and years.
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