Question

Calculate variance from the following information
1.20, 1.50, 1.80, 1.23, 1.25, 1.26, 2.10, 2.10, 2.10, 4.10
Select one
o a. 0.765
b. 0.675
c. 1.321
d. 0.567​

Answer 1

Answer:

Answer is A i.e. 0.765

Step-by-step explanation:

Mean can be calculated as

Mean = (1.20 + 1.50 +1.80 + 1.23 + 1.25 + 1.26 + 2.10 + 2.10 + 2.10 + 4.10)/10 = 1.864

Variance can be calculated as

Variance = ((1.20-1.864)^2 + (1.50-1.864)^2 + (1.80-1.864)^2 + (1.23-1.864)^2 + (1.25-1.864)^2 + (1.26-1.864)^2 + (2.10-1.864)^2 + (2.10-1.864)^2 + (2.10-1.864)^2 + (4.10-1.864)^2)/(10-1) = 0.765

So its answer is A