Mark B. answered • 09/23/18
PhD candidate with strong statistics and tutoring experience.
Good Morning,
The mean is the total divided by the number of cases. In the data set you present, there are 8 cases, and the total is 160, therefore the mean or X bar is 20.00 or B.
Put another way: To calculate the mean, here is the formula:
x bar = Σ 5 +17 +22 + 56 + 4 + 2 + 33 +21
---------------------------------------
n
Where  x bar; equals the mean, and ∑ equals the summation, and n equals the number of cases or observations.
I hope this assists and you have a great weekend. Please feel free to add any feedback in the comment section below or, if you need additional assistance, please feel free to reach out to any tutor.
The mean is the total divided by the number of cases. In the data set you present, there are 8 cases, and the total is 160, therefore the mean or X bar is 20.00 or B.
Put another way: To calculate the mean, here is the formula:
x bar = Σ 5 +17 +22 + 56 + 4 + 2 + 33 +21
---------------------------------------
n
Where  x bar; equals the mean, and ∑ equals the summation, and n equals the number of cases or observations.
I hope this assists and you have a great weekend. Please feel free to add any feedback in the comment section below or, if you need additional assistance, please feel free to reach out to any tutor.
Mark B.
Please note: I originally had used π to represent the mean, due to the special character list not having the symbol of x bar which is used to represent the mean. This was incorrect on my behalf due to that symbol representing pie. Often statistics texts will use M to represent the mean, however, since it is clear you are near the beginning of your class, I personally find that using M adds confusion, due to the symbol of median in statistics frequently using that symbol.
I have corrected the answer by typing the words x bar which is merely an x with a line across the top of the x indicating mean. My apologies for causing you any confusion, and I honestly do not know why I had used that symbol when showing you the answer and process of arriving at that particular answer to your question. Many thanks in advance.
09/23/18