Estimating the Mean Difference

Question 1

The manufacturer would like to construct a 99% confidence interval for the mean difference (A – B) in amount of tread remaining. Are the conditions for inference met?

Revolt · Accepted Answer

✔ paired data from a random experiment; Random: We have .: paired data from a random experiment; 10%:: Does not apply; Normal/Large Sample: The sample size is , meaning ndiff ≥ .: large; Normal/Large Sample: The sample size is , meaning ndiff ≥ .: 30; The conditions for inference are .: met

Question 2

Construct a 99% confidence interval for the mean difference (A – B) in amount of tread remaining. Here is a t-distribution table.

Revolt · Accepted Answer

✔ 2.626; 0.45 ±: 2.626; (, ): 0.429; (, ): 0.471; df =: 100

Question 3

MetNot met✔ Does not apply

Revolt · Accepted Answer

✔ Does not apply

Question 4

✔ 0.4290.4340.471

Revolt · Accepted Answer

✔ 0.429

Question 5

0.4290.466✔ 0.471

Revolt · Accepted Answer

✔ 0.471

Question 6

510✔ 100101

Revolt · Accepted Answer

✔ 100

Question 7

A 99% confidence interval for the mean difference (A – B) in amount of tread remaining is 0.429 mm to 0.471 mm.

Revolt · Accepted Answer

✔ No; the confidence interval , so it reasonable to claim that there is no significant difference in the amount of tread remaining for these two types of rubber.: No; the confidence interval , so it reasonable to claim that there is no significant difference in the amount of tread remaining for these two types of rubber.: does not contain zero; the confidence interval , so it reasonable to claim that there is no significant difference in the amount of tread remaining for these two types of rubber.: is not

Estimating the Mean Difference Answers

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