8 All of the following are steps in a test of hypothesis exc

8. All of the following are steps in a test of hypothesis except:

a. specify the level of significance

b. form the null and alternative hypotheses

c. calculate observed value of the test statistic

d. all of the above are steps in a test of hypothesis

e. none of the above are steps in a test of hypothesis

9. When a judge sends an innocent person to jail he is making a:

a. Type I error

b. Type II error

c. Type III error

d. Type IV error

e. none of the above

10. The null hypothesis in a one way ANOVA with three groups is:

11. A researcher conducted a one-way ANOVA with four groups and a total sample size of 100. In
order to obtain the correct F value from the F table she should use the following degrees of freedom:

a. df (between) = 4, df (within) = 96

b. df (between) = 4, df (within) = 100

c. df (between) = 3, df (within) = 99

d. df (between) = 3, df (within) = 100

e. none of the above

12. With all else held constant, performing multiple comparisons without choosing an adjustment method results in:

a. Inflated Type I error

b. Inflated Type II error

c. Both of the above

d. Greater power

e. None of the above

13. For any two continuous variables X and Y, all of the following statements are true for the sample Pearson product moment coefficient of correlation, r except:

a. r is a measure of linear relationship between X and Y.

b. The value of r always lies between -1 and +1.

c. When r = 0 it means that there is no correlation between X and Y.

d. Correlation is strongest when r = 1, and weakest when r = -1.

e. None of the above (i.e. all of the above statements are true)

14. The pattern shown in Figure 2 is consistent with:

a. Positive (but not perfect) correlation between X and Y

b. Negative (but not perfect) correlation between X and Y

c. Perfect positive correlation between X and Y

d. Perfect negative correlation between X and Y

e. No correlation between X and Y

15. The most likely value of r, given the pattern in Figure 2, is:

a. –0.8

b. 0

c. .1

d. .9

e. 1

Solution

Q10.
b. µ1 =µ2 =µ3
Step 1                  
   Null Hypothesis Ho :           µ1 =µ2 =µ3    
   Alternative Hypothesis :           µ1 µ2 µ3

Q11.
e. none of the above

Degrees of freedom between = k - 1 = 4 - 1 = 3
Degrees of freedom Within = 100 - 4 = 96

Q13.
e. None of the above (i.e. all of the above statements are true)

Correlation is the measure of the strength of a linear relationship

Q14.
a. Positive (but not perfect) correlation between X and Y

Q15.
d. .9

As the reason it is strongly postively correlated