Answer:
The variance for given sample is 1.69
Step-by-step explanation:
We are given the following in the question:
8, 7, 5, 7, 4, 7, 6, 7, 8, 8, 8, 6
This is the data for number of hours of sleep preceeding the exam night.
The sample standard deviation, s = 1.3
The variance is the square of standard deviation.
[tex]\text{Variance} = s^2[/tex]
Putting values, we get,
[tex]\text{Variance} = (1.3)^2 = 1.69[/tex]
Thus, the variance for given sample is 1.69
