A sample of 6 rivets is randomly selected and the following diameters are measured in millimeters....
A sample of 6 rivets is randomly selected and the following diameters are measured in millimeters. Give a point estimate for the population variance. Round your answer to three decimal places.
8.01, 7.99, 8.05, 8.00, 8.04, 8.05
Homework Answers
Solution :
n = 6
= 
= (8.01 + 7.99 + 8.05 + 8.00 + 8.04 + 8.05) / 6 = 8.023
A point estimate for the population variance is sample variance .
s2 = 
(x
- )2 / n -
1
= 0.0035333 / 5
= 0.001
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