QUESTION 12

Which of the followings are the assumptions behind One Way ANOVA F-test? (There are two correct answers. No partial credit for this question.)

	A.	Homogeneity of variances
	B.	Large samples
	C.	Normality
	D.	Stratified samples

QUESTION 6

A researcher wishes to see if the average length of time for relieving from a certain type of headache after taking a medicine is different from 30 minutes for a certain population. A random sample of 6 subjects from this population is selected and a one sample t-test will be used on the data.

The data is the following (in minutes): 19, 24, 25, 24, 27, 29

Use the data to perform a t-test for testing the research hypothesis mentioned above. Which of the followings are correct? There are two correct answers. Must select all correct answers to earn credit for this question.

	A.	There's sufficient evidence to support that the average length of time for relieving from a certain type of headache after taking a medicine is statistically significantly different from 30 minutes for the sampled population, at 5% level of significance.
	B.	Since the p-value from the normality test is 698, we can use it to conclude that the average length of time for relieving from a certain type of headache after taking a medicine is not statistically significantly different from 30 minutes for the sampled population.
	C.	The alternative hypothesis is that the average length of time for relieving from a certain type of headache after taking a medicine is different from 30 minutes for the sampled population.
	D.	The null hypothesis is that the average length of time for relieving from a certain type of headache after taking a medicine is different from 30 minutes for the sampled population.