Question

Workmen
Machine type
A
B
C
D
1
44
38
47
36
2
46
40
52
43
3
34
36
44
32
4
43
38
46
33
5
38
42
49
39
i) Test whether the mean productivity is the same for the four different machine types.
ii) Test whether 5 men differ with respect to mean productivity.