A random sample of 144 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 0.3 ounces. In this problem the 0.3 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

In this problem, 0.3 ounces is the standard deviation of the population, which is a fixed characteristic of the population and is therefore a parameter, not a statistic or the standard error of the mean. It is also not the average content of colognes in the long run, as that would require multiple samples and averaging their results.

A Random Sample of 144 Bottles of Cologne Showed an Average