The Sample Mean

In the box below, please enter the sample mean of the data given above, then click on the “Check your answer!” button. Please round your answer to the ten-thousandths place.

Your guess:

You got the correct answer of 64.25. Congratulations!

Unfortunately, your answer was not correct. Either try again or click on “Show Solution” below to see how to obtain the correct answer.

Show Formula

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Here is the formula you can use to calculate the sample mean.

In this formula, there are several symbols to know:

Show Solution

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Thus, the mean of these 4 values is 64.25.

Show the R Code

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Copy and paste the following code into your R script window, then run it from there.

In the R output, the mean is the number output by the script.

Show the Excel Code

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Copy and paste the following code into your Excel spreadsheet window, making sure your cursor is in A1 when you paste.

Note that the function in Excel is AVERAGE and not MEAN.