Correct Answer - Option 2 : 0
Given:
The variance of 7, 7, 7, 7, 7
Formula used:
Variance = summation (x - x̅ )2/number of observation
Calculation:
According to the question,
Mean = (7 + 7 + 7 + 7 + 7)/2
⇒ x̅ = 35/5 = 7
All observation are same then summation (x - x̅ )2 = 0
Variance = 0/5
⇒ 0
∴ The variance of 7, 7, 7, 7, 7 is 0.