following were measured on each animal in the study. sex, initial weight, weight gain, grade of meat, where grade is recorded as (A, B, or C). The scale of measurement of these variable are: (a) Nominal, ratio, interval, nominal (b) Nominal, ratio, ratio, nominal (c) Nominal, ratio, ratio, ordinal (d) Ordinal, ratio, ratio, ordinal (e) Ordinal, ratio, ratio, nominal

11. A study was conducted to investigate the effect of a coal-fire generating plant upon the water quality of a river. As part of an environmental impact study, fish were captured, tagged, and released. The following information was recorded for each fish: sex(0=female, 1=male), length(cm), maturation (0=young, 1=adult), weight(g). The scale of these variables is:

12. As part of a study to investigate the effects of stubble burning, the following variables were measured at several sites around in Iowa: pH of soil (to one decimal place, e.g., 6.3); crop grown (0=corn; 1=wheat, 2=barley, 3=oats, 4=other); amount of stubble (0=light, 1=medium, 2=heavy); amount of final harvest (in metric tons). The scales of these variables are:

13. A numerical value used as a summary measure for a sample, such as sample mean, is known as a

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3 14. Since the population size is always larger than the sample size, then the sample statistic a. can never be larger than the population parameter b. can never be equal to the population parameter c. can never be zero d. can never be smaller than the population parameter e. None of the above answers is correct.

15. μ (Mu) is an example of a

16. The mean of a sample is

17. The sum of the percent frequencies for all classes will always equal to

18. In a five number summary (Box-plot), which of the following is not used for data summarization? a. the smallest value b. the largest value c. the median d. the 25th percentile e. the mean

19. Since the mode is the most frequently occurring data value, it