Example 9: Find the sample variance and standard deviation for the following data: 5, 4, 6, 10, 15. Use the shortcut formula to complete the calculations. ? X = ? X² = s² = s = Example 10: Find the sample variance and standard deviation for the following grouped data. Use the shortcut formula to complete the calculations.
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Step 1
To do this, we will add up all the numbers and divide by the total number of data points. Mean (µ) = $\frac{5+4+6+10+15}{5}$ = $\frac{40}{5}$ = $8$ Show more…
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