STAT 4201 Midterm: STAT 421 OSU PastExam2 WithSolutions-1
31 Jan 2019
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Show all of your work for partial credit. This is a closed book, closed notes, closed neighbor exam. You may use a calculator and two pages of notes. All neces- sary statistical tables are provided: vertebrate animals are thought to be unidirectional in growth, with size either increas- ing or holding steady throughout life. Marine iguanas from the galapaos are unusual because they might actually shrink during low food periods. Carry out an appropriate hypothesis test to address this question at level. Be sure to clearly state your hypotheses, compute the test statistic, give the p-value, and state your conclusions, both with respect to the hypotheses and with respect to the problem. H0 : = 0 vs. h1 : < 0 where is the mean change in size. The p-value is p (z < 2. 53) = 0. 5 0. 4943 = 0. 0057. Since the p-value is less than 0. 05, we reject h0.
