A sample has the following characteristics :
- Size : n=64
- Standard deviation : \sigma=2
- Mean : \bar{x}=13
Find a confidence interval for the population mean with a confidence of 95%.
A sample has the following characteristics :
- Size : n=100
- Standard deviation : \sigma=18
- Mean : \bar{x}=86
Find a confidence interval for the population mean with a confidence of 95%.
A sample has the following characteristics :
- Size : n=625
- Standard deviation : \sigma=50
- Mean : \bar{x}=145
Find a confidence interval for the population mean with a confidence of 99%.
A sample has the following characteristics :
- Size : n=289
- Standard deviation : \sigma=68
- Mean : \bar{x}=401
Find a confidence interval for the population mean with a confidence of 95%.
A sample has the following characteristics :
- Size : n=324
- Standard deviation : \sigma=18
- Mean : \bar{x}=99
Find a confidence interval for the population mean with a confidence of 95%.
A sample has the following characteristics :
- Size : n=81
- Standard deviation : \sigma= 27
- Mean : \bar{x}=55
Find a confidence interval for the population mean with a confidence of 90%.
A sample has the following characteristics :
- Size : n=256
- Standard deviation : \sigma=32
- Mean : \bar{x}=75
Find a confidence interval for the population mean with a confidence of 99%.