A researcher was reviewing the results of one of his experiment's conditions which had N=49, M=22, and SD=6. He knew that the SD indicated that the scores within this condition could be expected to vary between about 22 6.00, or between about 16 and 28. He wondered how stable the condition mean is, and how far he could expect it to vary on average from the observed M of 22 if he could repeat the experiment multiple times.

What is the name of the statistic the researcher is looking for?

Calculate the value showing your work [Hint: you can use the word "sqrt" to indicate that you took the square root of a value or you can use the square root symbol in the "Insert" menu for this item in Canvas). Please be sure to round your answer to two decimal places: .