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The null and alternate hypotheses are:
H0: μ1 = μ2
H1: μ1 ≠ μ2
A random sample of 10 observations from one population revealed a sample mean of 23 and a sample standard deviation of 4. A random sample of 8 observations from another population revealed a sample mean of 26 and a sample standard deviation of 5. At the .05 significance level, is there a difference between the population means?
Assuming that these data reflect a random sample of the population of contributions that would be received, compute the sampling error based on the claim made by the consult
The number of complaints that a dry-cleaning establishment receives per day is a random variable having a Poisson distribution with λ = 3.3. Use the formula for the Poisson
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How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 5% with 98% confidence?
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