Answer:
Step-by-step explanation: The sample variance is calculated as follows:
Square each data point:
3^2 = 9
10^2 = 100
4^2 = 16
7^2 = 49
Add these squared values together:
9 + 100 + 16 + 49 = 164
Divide by the number of data points minus 1:
164 / (3 - 1) = 164 / 2 = 82
Rounding to one decimal place, the sample variance is 82.