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You are given the following...

You are given the following data. Test the claim that there is a difference in the means of the two groups. Use = 0.01.

Group A Group B

= 7 = 10

= 12 = 11

= 66 = 92

· State the null and alternate hypotheses

· Determine which test statistic applies, and calculate it

· Determine the critical value(s).

· State your decision: Should the null hypothesis be rejected?

2. A machine produces 9 inch latex gloves. A sample of 73 gloves is selected, and it is found that 58 are shorter than they should be. Find the 99% confidence interval on the proportion of all such gloves that are shorter than 9 inches.

Group A Group B

= 7 = 10

= 12 = 11

= 66 = 92

· State the null and alternate hypotheses

· Determine which test statistic applies, and calculate it

· Determine the critical value(s).

· State your decision: Should the null hypothesis be rejected?

2. A machine produces 9 inch latex gloves. A sample of 73 gloves is selected, and it is found that 58 are shorter than they should be. Find the 99% confidence interval on the proportion of all such gloves that are shorter than 9 inches.

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