From a population that is not normally distributed and whose standard deviation is not known, a sample of 50 items is selected to develop an interval estimate for $\mu$. Which of the following statements is true?
A)The standard normal distribution can be used.
B)The t distribution with 50 degrees of freedom must be used.
C)The t distribution with 49 degrees of freedom must be used.
D)The sample size must be increased in order to develop an interval estimate.

Question

Quizplus · Accepted Answer

When the population standard deviation is unknown and the sample size is 50, which is greater than 30, the t distribution with n-1 (49) degrees of freedom should be used to develop an interval estimate for the population mean $\mu$.

From a Population That Is Not Normally Distributed and Whose μ\muμ

From a Population That Is Not Normally Distributed and Whose $\mu$