Question

Which describes the standard deviation?

a form of measurement of the average difference between sample values and the sample mean
the confidence level that a sample mean accurately represents a population mean
the value for which half of the sample elements are no bigger, and half are no smaller
the interval around the sample mean that you expect to contain the population mean?

Answer 1

options are :
1)a form of measurement of the average difference between sample values and the sample mean
2)the confidence level that a sample mean accurately represents a population mean
3)the value for which half of the sample elements are no bigger, and half are no smaller
4)the interval around the sample mean that you expect to contain the population mean

Answer 2

I believe it would be "a" because to receive the standard deviation, you find the mean and then find the difference between the mean and each data value, and then square it.