A random sample of 121 bottles of cologne showed an average content of 4 ounces.It is known that the standard deviation of the contents (i.e., of the population) is 0.22 ounces.In this problem the 0.22 is
A) a parameter.
B) a statistic.
C) the standard error of the mean.
D) the average content of colognes in the long run.

Question

Quizplus · Accepted Answer

The 0.22 is the standard deviation of the population, not a calculated value from a sample, so it is a parameter. A statistic is a calculated value from a sample, so it is not the answer. The standard error of the mean is calculated by dividing the standard deviation by the square root of the sample size, so 0.22 is not the standard error of the mean. The average content of colognes in the long run cannot be determined from the information given, so it is not the answer.

A Random Sample of 121 Bottles of Cologne Showed an Average