The null and alternate hypotheses are: H0 : μ1 = μ2H1 : μ1 ≠ μ2 A random sample of 12 observations from one population revealed a sample mean of 24 and a sample standard deviation of 3.8. A random sample of 8 observations from another population revealed a sample mean of 28 and a sample standard deviation of 3.7. At the 0.01 significance level, is there a difference between the population means? a) State the decision rule. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) The decision rule is to reject H0 if t <_______ or t >__________ b) Compute the pooled estimate of the population variance. (Round your answer to 3 decimal places.) c) Compute the test statistic.(Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)
The null and alternate hypotheses are:
H0 : μ1 = μ2
H1 : μ1 ≠ μ2
A random sample of 12 observations from one population revealed a sample mean of 24 and a sample standard deviation of 3.8. A random sample of 8 observations from another population revealed a sample mean of 28 and a sample standard deviation of 3.7.
At the 0.01 significance level, is there a difference between the population means?
a) State the decision rule. (Negative amounts should be indicated by a minus sign. Round your answers to 3 decimal places.) The decision rule is to reject H0 if t <_______ or t >__________
b) Compute the pooled estimate of the population variance. (Round your answer to 3 decimal places.)
c) Compute the test statistic.(Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)
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