Calculate the variance of a sample for which $n = 5 , \sum ^ { 2 } = 1320 , \sum ^ { x } = 80$
A) 8.00
B) 3.16
C) 10.00
D) 326.00

Name: Calculate the variance of a sample for which $n = 5 , \sum ^ { 2 } = 1320 , \sum ^ { x } = 80$ A) 8.00 B) 3.16 C) 10.00 D) 326.00
Brand: Quizplus
Rating: 4.8 (37 reviews)

Question

Quizplus · Accepted Answer

The variance of a sample is calculated using the formula $s^2 = \frac{\sum x^2 - (\sum x)^2 / n}{n - 1}$. Plugging in the given values, we get $s^2 = \frac{1320 - (80)^2 / 5}{5 - 1} = \frac{1320 - 1280}{4} = \frac{40}{4} = 10.00$.

Calculate the Variance of a Sample for Which n=5,∑2=1320,∑x=80n = 5 , \sum ^ { 2 } = 1320 , \sum ^ { x } = 80n=5,∑2=1320,∑x=80

Calculate the Variance of a Sample for Which $n = 5 , \sum ^ { 2 } = 1320 , \sum ^ { x } = 80$