In class exercise chapter 5

In class exercise chapter 5 - 1 1.1 Inclass exercise What...

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Inclass exercise 1.1 What is wrong?(5.10) Explain what is wrong in each of the following scenarios. 1. In the binomial setting X is a proportion. 2. The variance for a binomial count is r p (1 - p ) n . 3. The normal approximation to the binomial distribution is always accurate when n is greater than 1000. 1.2 Treatment and control group(5.61) If we have a sample of n observations from a treatment group and an independent sample of m observations of a control group. Suppose that the response to the treatment has the N ( μ X , σ X ) distribution and that the response of control subjects has N ( μ Y , σ Y ) distribu- tion. Inference about the diFerence μ Y - μ X between the population means is based on the diFerence ¯ y - ¯ x between the sample means in the two groups. 1. Under the assumptions given, what is the distribution of ¯ y or ¯ x ? 2. What is the distribution of ¯ y - ¯ x ? 1
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This note was uploaded on 12/10/2010 for the course ECON 3101 taught by Professor Staff during the Spring '08 term at Minnesota.

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In class exercise chapter 5 - 1 1.1 Inclass exercise What...

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