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Unformatted text preview: Math 127B, Notes for lecture 14 Mrinal Raghupathi Wednesday March 16th, 2011 Administrivia Today we will discuss tests of significance. Reminders 1. Homework 7 is due Thursday, 3/17 in recitation. 2. Quiz in recitation over chapter 26 on 3/17. 3. This weeks recitation will be a discussion of problems from chapter 27. 1 Tests for randomized control experiments We can apply the methods that we used for differences from two independent samples to randomized control experiment. In a randomized control experiment the sample is divided into two groups: treatment and control. For example in a drug trial with a 1,000 subjects, 500 of them are randomly assigned to receive the drug and the rest are given a placebo. The results from the two groups are compared to see whether the treatment is effective. We can apply the two sample z-test as if the two groups are independent simple random samples....
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