12.50 Four different types of heads were tested on each of two sealing machines. Four independent measurements of strain were then made on each head/machine combination. The data are given table below.

a Perform an analysis of variance, making all appropriate tests at the 5% level of significance.
b If you were to use machine A, which head type would you recommend for maximum strain resistance in the seal? Why?

Transcribed Image Text:

Head 1 2 3 4 3 2 6 3 0 1 Machine A 4 1 1 3 68 7 6 Machine B 6 3 5 4 114767 5882012 0