STAT 2040 Study Guide - Final Guide: Chi-Squared Test, Iris Virginica, Iris Versicolor
21 Mar 2013
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Stat*2040 fall 2012: a test statistic value of z = !1. 34 was obtained when a test for the equality of binomial proportions, h : o. 2 p = p versus h : p p , was conducted. The p-value for this test is closest to: 1 (a) 0. 09 (b) 0. 18 (c) 0. 41 (d) 0. 82 (e) 0. 91: a nursery advertises that 90% of its stock survives transplanting. An apartment complex purchases 80 trees from this nursery, and 12 do not survive. A 95% confidence interval for the proportion of trees that survive has the limits: (a) 0. 150 0. 066 (b) 0. 150 0. 078 (c) 0. 850 0. 066 (d) 0. 850 0. 078 (e) 0. 900 0. 066. In a particular large population of people, a researcher wished to test her hypothesis that the proportion of left-handed people in the population was 10%. Based on a random sample, a 95% confidence interval for the true proportion of (0. 092, 0. 132) was obtained.
