Question

The null and alternate hypotheses are: H0: μ1 ≤ μ2 H1: μ1 > μ2 A random sample of 20 items from the first population showed a mean of 112 and a standard deviation of 16. A sample of 17 items for the second population showed a mean of 97 and a standard deviation of 12. Assume the sample populations do not have equal standard deviations.

a) Find the degrees of freedom for unequal variance test. (Round down your answer to the nearest whole number.)

Degrees of freedom

b.	State the decision rule for 0.025 significance level. (Round your answer to 3 decimal places.)

Reject H0 if t>

c.	Compute the value of the test statistic. (Round your answer to 3 decimal places.)

Value of the test statistic

d.	What is your decision regarding the null hypothesis? Use the 0.025 significance level.

Null hypothesis

(Click to select)not rejectedrejected

Answer 1