The EPA wants to determine whether temperature changes in the ocean's water caused by a nuclear power plant will have a significant effect on the animal life in the region. Recently hatched specimens of a certain species of fish are randomly divided into four groups. The groups are placed in separate simulated ocean environments that are identical in every way except for water temperature. Six months later, the specimens are weighed. The results (in ounces) are given in the accompanying table. Do the data provide sufficient evidence to indicate that one (or more) of the temperatures tend(s) to produce larger weight increases than the other temperatures? Test using α = .10.
Weight of Specimens
|
38oF
|
42oF
|
46oF
|
50oF
|
|
22
|
15
|
14
|
17
|
|
24
|
21
|
28
|
18
|
|
16
|
26
|
21
|
13
|
|
18
|
16
|
19
|
20
|
|
19
|
25
|
24
|
21
|
|
|
17
|
23
|
|