1. Which of the following symbols stands for the population mean?

a. m

b. s

c. r

d. SD

2. Which of the following is a directional alternative hypothesis?

a. m1 > m2

b. m1=m2

c. m1 ¹ m2

d. 02 ¹ 02

3. If you drew all possible samples from some population, calculated the mean for each of the samples, and constructed a line graph (showing the shape of the distribution) based on all of those means, what would you have?

a. A population distribution

b. A parameter

c. A sample distribution

d. A sampling distribution

4. What is the standard deviation of a sampling distribution called?

a. Sampling deviation

b. Standard variance

c. Standard deviation

d. Standard error

5. In what type of statistics do you use the value of your sample statistic as your best guess of the unknown population parameter?

a. Hypothesis testing

b. Descriptive statistics

c. Point estimation

d. Interval estimation

6. Which hypothesis is viewed as the "status quo" or the "nothing new" hypothesis?

a. Inferential hypothesis

b. Null hypothesis

c. Research hypothesis

d. Alternative hypothesis

7. If a researcher concludes that the confidence interval is 55% plus or minus 5%, then which of the following is true?

a. The margin of error is 5%

b. The margin of error is 10%

c. The level of confidence is 10%

d. The level of confidence is 5%

8. Which of the following statements sounds like a null hypothesis

a. The defendant is guilty

b. There is a correlation in the population

c. The coin is not fair

d. There is no difference between male and female incomes in the population

9. What significance level do most educational researchers use?

a. .05

b. .5

c. .01

d. .1

10. A researcher does a study and reports that the statistic she calculated has a p <.05. What does this statement mean?

Select one:

a. The probability of this outcome or one more extreme was .95

b.

The probability of this outcome or one more extreme is less than .05 if the null hypothesis is true

c.

Her outcome was very likely assuming the null is true

d. The probability of this outcome was high