A simple random sample of 100 observations was taken from a large population the sample mean and the standard deviation were determined to be 80 and 12 respectively. The standard error of the mean is 0.12 A. True
B. False

A. True.

Step-by-step explanation:

To get the standard error of the mean, you need to do the sample standard deviation over the square root of the number of samples, n.

In this case, n = 100. The standard deviation is 12. To get the SAMPLE standard deviation, you do the population standard deviation over the square root of n. That is 12 / sqrt(100) = 12 / 10 = 1.2.

So, to get the standard error: 1.2 / sqrt(100) = 1.2 / 10 = 0.12.

The standard error of the mean is, indeed, 0.12, so the statement is A. True.

Hope this helps!

alright well the answers to your question is

2xy/9 hope this have a nice day : )

step-by-step explanation: