Measurements of the hardness of a sample of wood were taken using?

Question

Measurements of the hardness of a sample of wood were taken using
different machines. The data are given below.
2.1 1.9 2.5 2.3 2.5 3.1
1.5 2.8 2.6 2.6 1.8 2.7
Test the hypothesis that the population variance is no more than 0.08
at the 5% significance level.

Answer 1

Grading of lumber can be done in many ways according to a variety of "Associations", but, it must follow "U.S. Department of Commerce American Lumber Standards" in the U.S.A.