Samples of 100 8-hour shifts were randomly selected from the police records for each of two...
Samples of 100 8-hour shifts were randomly selected from the police records for each of two districts in a large city. The number of police emergency calls was recorded for each shift. The sample statistics are listed below.
| Region | |||
|---|---|---|---|
| 1 | 2 | ||
| Sample Size | 100 | 100 | |
| Sample Mean | 2.8 | 3.6 | |
| Sample Variance | 1.94 | 2.44 | |
Find a 90% confidence interval for the difference in the mean numbers of police emergency calls per shift between the two districts of the city. (Use
μ1 − μ2.Round your answers to two decimal places.)
______________ calls per shift to_________________ calls per shift
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Samples of 100 8-hour shifts were randomly selected from the
police records for each of two...
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Suppose you want to test the claim that µ1 < µ2. Two samples are randomly selected...
Suppose you want to test the claim that µ1 < µ2. Two samples
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n1 = 35
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2.9
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Suppose you want to test the claim that µ1 < µ2. Two samples
are randomly selected from each population. The sample statistics
are given below. At a level of significance of α = 0.05, when
should you reject H0?
n1 = 35
n2 = 42
x̅1 = 29.05 x̅2 =
31.6
s1 =
2.9
s2 = 2.8
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