Quiz about Review Questions on Hypothesis Testing, Correlation, Regression

Question 1

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

Accepted Answer

Level of Significance

Answer

Hypothesis

Answer

Critical Value

Answer

Level of Confidence

Question 2

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

Accepted Answer

Critical Value

Answer

Level of Significance

Answer

Hypothesis

Answer

Level of Confidence

Question 3

What is the hypothesis that indicates NO DIFFERENCE?

Accepted Answer

Null Hypothesis

Answer

One-tailed test

Answer

Alternative Hypothesis

Answer

Critical Value

Question 4

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?

Accepted Answer

Non-directional test

Answer

Directional test

Answer

Alternative Hypothesis

Answer

Critical Value

Question 5

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

Accepted Answer

Type I

Answer

Type II

Answer

Type I and II

Answer

None of these

Question 6

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

Accepted Answer

Type II

Answer

Type I

Answer

Type I and 2

Answer

None of these

Question 7

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?

Accepted Answer

Perfect positive correlation

Answer

Very strong correlation

Answer

Perfect correlation

Answer

Perfect negative correlation

Question 8

What is another term for the independent variable, x?

Accepted Answer

Predictor

Answer

Coefficient

Answer

Outcome

Answer

Response

Question 9

What is the general form of the regression line equation?

Accepted Answer

$$y=bx+a$$

Accepted Answer

$$y=mx+b$$

Answer

$$y=bx^2+a$$

Answer

$$y=ax+m$$

Question 10

For a two-tailed t-test with 0.01 level of significance, what is the critical value if df = 9?

Accepted Answer

$$\pm\ 3.250$$

Answer

$$\pm\ 2.821$$

Answer

$$\pm\ 3.169$$

Answer

$$\pm\ 2.764$$

Question 11

Tri-Q T-shirt Printing Company claims that the mean monthly salary of their employees is Php12,000.00 with a standard deviation of Php700. A researcher takes a random sample of 30 employees and found out that they have a mean monthly salary of Php11,650.00. Do the 30 selected employees have lower salaries than the rest? Test the claim at 0.05.

What is the null hypothesis?

Accepted Answer

$$\mu=12000$$

Answer

$$\mu<12000$$

Answer

$$\mu>12000$$

Answer

$$\mu\ e\ 12000$$

Question 12

Tri-Q T-shirt Printing Company claims that the mean monthly salary of their employees is Php12,000.00 with a standard deviation of Php700. A researcher takes a random sample of 30 employees and found out that they have a mean monthly salary of Php11,650.00. Do the 30 selected employees have lower salaries than the rest? Test the claim at 0.05.

What is the level of significance?

Accepted Answer

0.05

Answer

0.01

Answer

0.02

Answer

0.10

Question 13

The choice of alpha affects the results of a hypothesis test.

Accepted Answer

TRUE

Answer

FALSE

Question 14

It is possible for the linear correlation coefficient to be equal to 5.

Accepted Answer

FALSE

Answer

TRUE

Review Questions on Hypothesis Testing, Correlation, Regression

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