This data is from a sample. Calculate the mean, standard deviation, and variance.

x20.113.825.728.329.943.143.4
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Please round the following answers to 2 decimal places.

Sample Mean =

Sample Standard deviation =

Sample Variance =

Oops - now you discover that the data was actually from a population. Which of the values above do you not need to recalculate?

You don't need to recalcuate the .



Hint: Textbook Measures of Spread