Question

14.

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

Select one:

a. a parameter.

b. the standard error of the mean.

c. a statistic.

d. the average content of colognes in the long run.

15.

A simple random sample of 64 observations was taken from a large population. The sample mean and the standard deviation were determined to be 320 and 120 respectively. The standard error of the mean is

Select one:

a. 5

b. 40

c. 15

d. 1.875

Answer 1

Solution:

given that,

14)

In this problem 0.22 is the parameter.

option a. is correct.

15) n = 64

the standard error is

=120/sqrt(64)

=15

option c. is correct.