The parameter is the population proportion.
The correct method to find the confidence interval is the Wald method (or normal approximation method for proportions).
State which type of parameter is to be estimated, and the correct method for the following. Do not solve.
(a) In a simple random sample of 400 voters, 210 said that they were planning to vote for the incumbent mayor in the next election. Construct a 95% confidence interval for the proportion of voters who plan to vote for the incumbent mayor in the next election.
The parameter is the population [blank].
The correct method to find the confidence interval is the [blank] method.
7 answers
The correct method to find the confidence interval is the [z or t?] method
The correct method to find the confidence interval is the z method.
DO NOT SOLVE
(b) A simple random sample of size 36 has mean x=3.7 and standard deviation s=1.83. Construct a 99%confidence interval for the population mean.
The parameter is the population [blank].
The correct method to find the confidence interval is the [z or t?] method
(b) A simple random sample of size 36 has mean x=3.7 and standard deviation s=1.83. Construct a 99%confidence interval for the population mean.
The parameter is the population [blank].
The correct method to find the confidence interval is the [z or t?] method
The parameter is the population mean.
The correct method to find the confidence interval is the t method.
DO NOT SOLVE
(c) A simple random sample of size 39 has mean x=3.97. The population standard deviation is o=1.67. Construct a 90% confidence interval for the population mean.
The parameter is the population [blank] .
The correct method to find the confidence interval is the [z or t?] method.
(c) A simple random sample of size 39 has mean x=3.97. The population standard deviation is o=1.67. Construct a 90% confidence interval for the population mean.
The parameter is the population [blank] .
The correct method to find the confidence interval is the [z or t?] method.
The parameter is the population mean.
The correct method to find the confidence interval is the z method.