Chapter 27: Hypothesis Testing

Which of the following is an appropriate null hypothesis for an ANOVA test?

Sample means are equal.

In a hypothesis test, a critical value of 0.01 as compared to a critical value of 0.05 would make it more difficult to reject a null hypothesis.

TRUE

The alternative hypothesis states what it is you are trying to prove.

TRUE

The computed value from a two sample t test measures how likely it would be to observe two samples this far apart from the same population.

TRUE

A health clinic with four facilities administers a patient satisfaction questionnaire at each of their clinics. Their objective is to determine if patient satisfaction differs across these locations. Which of the following tests would be appropriate.

ANOVA

For which of the following is an ANOVA analysis appropriate?

Comparing 3+ samples

A critical value of 0.10 would make it more difficult to reject a null hypothesis when compared to a critical value of 0.05.

FALSE

A two sample t test is conducted. The results show that the calculated p-value is 0.06. The critical p-value is 0.05. The null hypothesis should be rejected.

FALSE

Samples have been taken of a process before and after it has been improved. A two sample t test is conducted. The null hypothesis states that the two means are not equal.

FALSE

When testing a hypothesis that the population from which a sample has been taken is equal to or greater than a specific value, a two-tailed test is necessary

FALSE

An operational process has been found to be out-of-control. Corrective action has been taken. To confirm that the improved process is now meeting expectations, it would be appropriate to take samples and conduct a test of hypothesis.

TRUE

You are interested in determining whether or not a training program has met management's expectations. The alternative hypothesis states that it did meet expectations.

TRUE