The ________ is a statistic that assumes that the variable has a symmetric bell-shaped distribution and the mean is known (or assumed to be known)and the population variance is estimated from the sample.
A) z statistic
B) F statistic
C) t statistic
D) none of the above

Question

Quizplus · Accepted Answer

The description provided fits the t-statistic, which is used to test hypotheses about population means when the sample size is small and/or the population standard deviation is unknown. The z-statistic assumes a known population standard deviation and is appropriate when the sample size is large. The F-statistic is used in ANOVA to test for differences in means between multiple groups. None of the above is not a valid answer as one of the answer choices must be correct.

The ________ Is a Statistic That Assumes That the Variable