STAT 4201 Midterm: Statistics 421 PastExam2-2
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 one page of notes. Find c so that the test in (a) has level = 0. 04. (c) (5 pts) find the power of the test in (a) and (b) under the alternative given in (b). How large a sample should be taken: let x1 and x2 constitute a random sample from a normal population with 2 = 1. Evaluate the probability of a type ii error when 0 = 10 and 1 = 12. (c) (5 pts) more generally, consider the test that rejects the null hypothesis whenever. Explain the di erence between the two procedures in no more than 2-3 sentences. Forty of the embryos had been incubated 14 days and forty had been incubated 15 days. The associated summary statistics are shown in the table below.
