MAT 122 Lecture Notes - Lecture 11: Randomness, Stellar Classification, Test Statistic
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Uses- #3 (claims* about the the median of a single population) Refer to the following table for the ages of actresses who won the oscar for best actress. 0. 05 signi cance level to test the claim that the median age of oscar- winning actresses is equal. 0"s = 3 x= 27 n= 79 (drop the 3 0"s: median age is equal to 30, median age is not equal to 30. H1: m 30: =0. 05, z= [(x + . 5) - (n/2)] / [( n)/2, z= [(27 + . 5) - (79/2)] / [( 79)/2] Nd . 025 in in the body of the table: there is suf cient evidence to warrant the rejection of the claim that oscar- winning best actresses have a median age of 30, reject h0. Runs test for randomness: tests a list of data for a pattern or it it is just random. Each set of letters in the parentheses is a run".
