Independent random samples were selected from populations 1 and 2. The sample sizes, means, and variances are as follows.
Population | |||
1 | 2 | ||
Sample Size | 30 | 64 | |
Sample Mean | 11.4 | 6.9 | |
Sample Variance | 1.37 | 4.15 |
(a) Find a 95% confidence interval for estimating the difference
in the population means (μ1 −
μ2). (Round your answers to two decimal
places.)
to
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