To use ANOVA, the dependent variable must be measured at an interval or ratio level

1. To use ANOVA, the dependent variable must be measured at an interval or ratio level. (Points : 2)

a. True

b. False

3. ANOVA is a procedure for comparing three or population means. (Points : 2)

a. True

b. False

4. The symbol for “level of significance” is: (Points : 2)

a. ß

b. µ

c.a

d. s

15. Data that use numbers to provide categories or labels as well as the ordering of the categories are: (Points : 2)

a. Nominal

b. Ordinal

c. Ratio

d. Interval

16. A set of subjects, usually randomly sampled, selected to participate in a research study is called: (Points : 2)

a. Population

b. Sample

c. Mode group

d. Partial selection

17. In a time series analysis, the trend analysis procedure is analogous to regression analysis except that the x-variable is always some measure of “time.” (Points : 2)

a. True

b. False

18. If you determine that the upper and lower limits of a 99% confidence interval are 50 and 60, you can conclude that there is a 99% chance that the sample mean is between 50 and 60. (Points : 2)

a. True

b. False

19. The formula for ____________ is (Row total X Column total)/T (Points : 2)

a. Observed frequencies

b. Degrees of freedom

c. Expected frequencies

d. Sampling error

20. When you are estimating a population parameter, the larger the sample size: (Points : 2)

a. The larger the sampling error

b. The larger ? will be

c. The larger your sample statistic will be

d. The more accurate your estimate will be

21. The owner of a five fast-food restaurants wants to determine whether there is any difference among the five stores with respect to the average time it takes to fill an order at the drive-thru. He collects data (i.e., the total time between placing their order and picking up the order) on a random sample of 20 customers at each of the 5 stores at approximately the same time on the same day of the week. What statistical test/procedure should he use? (a = .01) (Points : 5)

a. Chi-Square

b. Regression Analysis

c. Confidence Interval

d. ANOVA

22. Two competing ice cream stores, Yum-Yum and Goody, both advertise quarter-pound scoops of ice cream. There is some concern about the variability in the serving sizes, so two members of a local consumer group have sampled 25 scoops of Yum-Yum’s ice cream (x? = 25, s2 = 16) and 11 scoops of Goody’s (x? = 25, s2 = 10). What formula would you use to determine if there is a difference in the variation of ice cream weights between Yum-Yum and Goody? Use a = 0.10. (Points : 5)

a. ? = b0 + b1x

b. t = ((x? - ?) - x-bar) ÷ s/?n

c. F = s12 ÷ s22
d. x? - t(s ÷ ?n) < µ < x? + t(s ÷ ?n)