Question

A group of 15 students has performed an experiment, they measured the coefficient of thermal expansion for aluminum. The results are as follows (10-6⁢ K-1).

22.0

25.0

25.6

22.2

22.7

24.9

24.9

20.8

26.1

23.7

23.5

20.1

21.4

22.8

20.4

At what level of significance do the students fail to reject the hypothesis that the mean coefficient value is the same as the table value of 22.2×10-6 K-1?

0.1

0.5

0.8

0.2

Answer 1