# f07_1 - Statistics 224 - lecture 1 (Bates) Midterm 1...

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Statistics 224 - lecture 1 (Bates) Midterm 1 2007-10-10 (p. 1) There are 25 questions. All questions have ﬁve choices, exactly one of which is correct. Choose the most appropriate answer. Mark only one selection. Use a pencil. The kfm data from the text give the milk intake (dl/day) of 50 infants approximately 2 months old; 25 girls and 25 boys. boy girl 5 6 7 8 9 10 Milk intake (dl/day) Density 0.0 0.1 0.2 0.3 4 6 8 10 12 boy girl > with(kfm, summary(dl.milk)) Min. 1st Qu. Median Mean 3rd Qu. Max. 4.440 6.555 7.660 7.504 8.428 10.430 > with(kfm, c(variance = var(dl.milk), std.dev. = sd(dl.milk))) variance std.dev. 2.284666 1.511511 > round(dexp(c(0.1, 0.25, 0.5, 1, 5), rate = 5), 4) [1] 3.0327 1.4325 0.4104 0.0337 0.0000 > round(pexp(c(0.1, 0.25, 0.5, 1, 5), rate = 5), 4) [1] 0.3935 0.7135 0.9179 0.9933 1.0000 > round(pexp(c(0.1, 0.25, 0.5, 1, 5), rate = 0.2), 4) [1] 0.0198 0.0488 0.0952 0.1813 0.6321 > round(qexp(c(0.01, 0.05, 0.5, 0.95, 0.99), rate = 5), 5) [1] 0.00201 0.01026 0.13863 0.59915 0.92103 > pbinom(c(16, 17, 18, 19, 20), size = 25, prob = 0.8) [1] 0.04677424 0.10912280 0.21996467 0.38331059 0.57932569

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Statistics 224 - lecture 1 (Bates) Midterm 1 2007-10-10 (p. 2) 1. The upper plot is called (a) a univariate box plot (b) a normal probability plot (c) a comparative density plot (d) a comparative box plot (e) an inversion 2. The lower plot is called (a) a univariate box plot (b) a normal probability plot (c) a comparative density plot (d) a comparative box plot (e) an inversion 3. Comparing the distribution of the boys’ milk intake to the girls’ intake we see (a) a
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## This note was uploaded on 03/06/2010 for the course STATS 324 taught by Professor Bates during the Fall '08 term at Wisconsin.

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f07_1 - Statistics 224 - lecture 1 (Bates) Midterm 1...

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