SAREX My Work simple random sample of 60 items resulted in a sample mean of 79. The population standard deviation is 13. Compute the 95% confidence interval for the population mean (to 1 decimal). Ⓡ Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). What is the effect of a larger sample size on the margin of error? It decreases

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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A simple random sample of 60 items resulted in a sample mean of 79. The population standard deviation is 13.
a. Compute the 95% confidence interval for the population mean (to 1 decimal).
Ⓡ
Ⓡ
b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals).
c. What is the effect of a larger sample size on the margin of error?
It decreases
Transcribed Image Text:Cut My Work A simple random sample of 60 items resulted in a sample mean of 79. The population standard deviation is 13. a. Compute the 95% confidence interval for the population mean (to 1 decimal). Ⓡ Ⓡ b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). c. What is the effect of a larger sample size on the margin of error? It decreases
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