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A psychologist operating a group home for delinquent adolescents needs to show that the home is successful at reducing delinquency. He samples 10 adolescents living in their own homes who have been identified by the police as having problems, 10 similar adolescents living in foster homes, and 10 adolescents living in the group home. As an indicator variable he uses truancy (number of days truant in the past semester), which is readily obtained from school records. On the basis of the following data, draw the appropriate conclusions:
Natural Home
Foster Home
Group Home
15
16
10
18
14
13
19
20
22
11
5
7
8
3
12
17
4
2
Suppose that we wish to estimate the average daily pollution in Lake Erie. The daily yield, recorded for n = 50 days, produced a mean and standard deviation equal to y = 871 tons and s = 21 tons, respectively.
prince edward island fisheries and environment has been feeding a special food to rainbow trout fingerlings in a pond.
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