Find the mean and variance for each of the data in Exercise.
Presenting the data in the tabular form, we get
We know that Mean, 
Where N = 
∴
We know that Variance, σ2 = 
∴ σ2 = (1/40) × 1736 = 43.4
Ans. Mean = 19 and Variance = 43.4
4
Find the mean and variance for each of the data in Exercise.
Presenting the data in the tabular form, we get
We know that Mean,
Where N =
∴
We know that Variance, σ2 =
∴ σ2 = (1/40) × 1736 = 43.4
Ans. Mean = 19 and Variance = 43.4