Year 1985 1990 1995 32 28 48 36 54 41 Art 26 39 47 39 47 49 39 47 38 44 66 35 52 31 57 56 63 72 Law 48 68 54 61 39 46 61 57 82 58 37 68 75 76 67 78 Medicine 44 67 75 83 33 47 71 77 75 77 49 55 75 77 89 82 Science 49 48 81 68 93 82 61 44 66 76 94 80 63 40 70 91 78 Technology 58 85 71 80 85 36 43 76 70 78 80 paļns
Book Prices. The R.R. Bowker Company collects data on retail prices of books and periodicals. Information about book prices is published in Publishers Weekly and in Bowker Annual: Library and Book Trade Almanac. Independent random samples were taken to compare retail book prices for five subjects (art, law, medicine, science, and technology) and three years (1985, 1990, and 1995). The table below displays the data, in dollars.
a. the response variable
b. the factors
c. the levels of each factor
d. the number of treatment combinations
e. the experimental units
f. the number of observations for each treatment combination
g. the experimental factors, if any
h. the classification factors, if any
i. whether the study is a designed experiment or an observational study
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