Hypothesis Testing

Question 1

What is the null hypothesis, , for this situation?

Revolt · Accepted Answer

B:

Question 2

The ⇒ alternative hypothesis represents the statistical claim that the company’s tablet computers have an average recharge time of less than 3 hours.

Revolt · Accepted Answer

Hₐ: μ < 3

Question 3

Which type of significance test should be used for this situation?✔ a left-tailed testX a two-tailed testa right-tailed test

Revolt · Accepted Answer

A: ✔ a left-tailed test

Question 4

= ⇒ -2.5

Revolt · Accepted Answer

-2.5

Question 5

Based on the z-statistic of –2.5 for the sample data, should the null hypothesis be rejected?

Revolt · Accepted Answer

A: Yes, because the z-statistic lies within the critical region.

Question 6

What is the alternative hypothesis,, for this situation?

Revolt · Accepted Answer

B:

Question 7

The speed limit on a road is 45 mph. You want to clock the speed of a random sample of cars to test the hypothesis that the average speed of cars is greater than the speed limit. What kind of test would you use?X a left-tailed testa two-tailed test✔ a right-tailed test

Revolt · Accepted Answer

C: ✔ a right-tailed test

Question 8

Based on the hypothesis test, what conclusion can you draw about the statistical claim that the average recharge time of the tablet computers is 3 hours?

Revolt · Accepted Answer

B: The claim should be rejected.

Hypothesis Testing Answers

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