After some preliminary analysis, it seems that there is difference among mean lifetimes of flashlight batteries of three different brands. Use a family confidence level of 0.95, apply Tukey multiple comparisons to compare the lifetimes of flashlight batteries of three different brands.
|
Brand A
|
Brand B
|
Brand C
|
|
38
|
32
|
24
|
|
36
|
27
|
25
|
|
31
|
28
|
29
|
|
42
|
|
26
|
|
29
|
|
|