From a population that is not normally distributed and whose standard deviation is not known, a sample of 6 items is selected to develop an interval estimate for the mean of the population (().
A.The normal distribution can be used.
B.The t distribution with 5 degrees of freedom must be used.
C.The t distribution with 6 degrees of freedom must be used.
D.The sample size must be increaseD.
Answer:D
From a population that is not normally distributed and whose standard deviation is not known, a sample of 6 items is selected to develop an interval estimate for the mean of the population (().
A.The normal distribution can be used. B.The t distribution with 5 degrees of freedom must be used. C.The t distribution with 6 degrees of freedom must be used. D.The sample size must be increaseD.