Question

A simple random sample of 60 items resulted in a sample mean of 65. The population standard deviation is 14.

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).

( , )

Answer #1

A simple random sample of 60 items resulted in a sample mean of
73. The population standard deviation is 14.
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).
( , )

A simple random sample of 60 items resulted in a sample mean of
71. The population standard deviation is 14. 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?

A simple random sample of 60 items resulted in a sample mean of
77. The population standard deviation is 17.
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).
( , )

A simple random sample of 60 items resulted in a sample mean of
89. The population standard deviation is 12.
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).

A simple random sample of 60 items resulted in a sample mean of
61. 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).
( , )

A simple random sample of 60 items resulted in a sample mean of
87. The population standard deviation is 18.
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). ( , )

A simple random sample of 60 items resulted in a sample mean of
62. 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).
( , )

A simple random sample of 60 items resulted in a sample mean of
81. 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).

A simple random sample of 60 items resulted in a sample mean of
91. The population standard deviation is 12. 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...

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?

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