Hypothesis Testing

What is definition of null hypothesis?

• The independent variable has no effect on the dependent variable for the population
• The independent variable does have an effect on the dependent variable
• The dependent variable has no effect on the independent variable
• The dependent variable does have effec on the independent variable

Tags

CCSS.HSS.IC.B.5

If the alpha level is increased from 0.01 to 0.05, then the boundaries for the critical region move farther away from the center of the distribution.

• True
• False

To check the normality test using Shapiro-Wilk, if the p-value is more than 0.05?

• The data is significant
• The data is not normal
• The data is normal
• Reject null hypothesis

Tags

CCSS.HSS.ID.A.4

To check the normality test using Shapiro-Wilk, if the p-value is below 0.05?

• Accept null hypothesis
• Reject null hypothesis
• Failed to reject null hypothesis
• Reject alternative hypothesis

Tags

CCSS.HSS.ID.A.4

Define a Type I error?

• The failure to reject a false null hypothesis
• Rejecting a true null hypothesis
• The acceptance to reject a null hypothesis
• Accepting a true null  hypothesis

If a sample mean is in the critical region with alpha level 0.05, it would still (always) be in the critical region if alpha were changed to 0.01?

• False
• True

If a sample mean is in the critical region with alpha level 0.01, it would still(always) be in the critical region if alpha were changed to 0.05?

• False
• True

Tags

CCSS.HSS.IC.A.1

In a research report, the term "significant" is used when the null hypothesis is rejected.

• True
• False

Tags

CCSS.HSS.IC.B.5

In a research report, the results of a hypothesis test include the phrase " z=3.15, p<0.01". This means that the test failed to reject the null hypothesis.

• True
• False

Tags

CCSS.HSS.IC.B.5

A z-score value in critical region means that you should reject the null hypothesis.

• True
• False

Tags

CCSS.HSS.ID.A.4