Question

which of the following is not required when using the t - statistic
a sample mean
b population mean
c sample standard deviation
d population standard deviation

Explanation:

The formula for the t - statistic is \(t=\frac{\bar{x}-\mu}{s/\sqrt{n}}\), where \(\bar{x}\) is the sample mean, \(\mu\) is the population mean, \(s\) is the sample standard deviation, and \(n\) is the sample size. The population standard deviation \(\sigma\) is not used in the formula for the t - statistic.

Answer:

D. population standard deviation