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. The standard error of the mean equals

The standard error of the mean is 0.02

Step-by-step explanation:

Here, we want to calculate the standard error of the mean.

Mathematically;

standard error of mean = SD/ √n

where SD is the standard deviation and n is the number of samples

From the question, SD = 0.22 and n = 121

Inserting this into the equation

Standard error of the mean = 0.22/√121

= 0.22/11 = 0.02

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step-by-step explanation: