Review Questions on Hypothesis Testing, Correlation, Regression

What do we call the probability of committing a Type I error?

• Level of Significance

• Hypothesis

• Critical Value

• Level of Confidence

What term is used to describe the values of the test statistic that separates the rejection and non-rejection regions?

• Level of Significance

• Hypothesis

• Critical Value

• Level of Confidence

What is the hypothesis that indicates NO DIFFERENCE?

• One-tailed test

• Alternative Hypothesis

• Critical Value

• Null Hypothesis

What do you call the hypothesis test where the rejection region lies on both end tails of the distribution, one on the left and one on the right?

• Directional test

• Alternative Hypothesis

• Critical Value

• Non-directional test

Which type of error/s is/are committed by the researcher if he rejected a null hypothesis that is true?

• Type I

• Type II

• Type I and II

• None of these

Which type of error/s is/are committed by the researcher if he failed to reject a null hypothesis that is false?

• Type I

• Type II

• Type I and 2

• None of these

Which best describes a linear correlation wherein all the points in the scatterplot lie on the trend line and the line points to the upper right?

• Very strong correlation

• Perfect correlation

• Perfect positive correlation

• Perfect negative correlation

What is the critical value for z given a right-tailed test with α = 0.05?

• +1.645

• -1.645

• +1.96

• -1.96

What is another term for the independent variable, x?

• Coefficient

• Predictor

• Outcome

• Response

What is the general form of the regression line equation?