A researcher determines a sample of size (n)100 is necessary to estimate a population mean with 95% confidence (z = 2).The calculation of sample size required that he estimate the population standard deviation since it was unknown,and he estimated it as 150.The 100 observations produced a sample mean and a sample standard deviation The resulting confidence interval is
A)970

Question

A researcher determines a sample of size (n)100 is necessary to estimate a population mean with 95% confidence (z = 2).The calculation of sample size required that he estimate the population standard deviation since it was unknown,and he estimated it as 150.The 100 observations produced a sample mean  and a sample standard deviation  The resulting confidence interval is
A)970 < m < 1030. 
B)996 < m < 1004. 
C)997 < m < 1003. 
D)960 < m < 1040. 
E)There are two possible confidence intervals.

Quizplus · Accepted Answer

The Answer of A researcher determines a sample of size (n)100 is necessary to estimate a population mean with 95% confidence (z = 2).The calculation of sample size required that he estimate the population standard deviation since it was unknown,and he estimated it as 150.The 100 observations produced a sample mean  and a sample standard deviation  The resulting confidence interval is
A)970 < m < 1030. 
B)996 < m < 1004. 
C)997 < m < 1003. 
D)960 < m < 1040. 
E)There are two possible confidence intervals.

A Researcher Determines a Sample of Size (N)100 Is Necessary