# HW17 - range is 0(2 What is the standard error(s.e In...

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ECO220Y: Homework, Lecture 17 Readings: Sections 9.1 Exercises: 9.1 – 9.4 Applets (CD-ROM): Applet 9 (page 302) Problems: (1) Recall the telework example in Lecture 17. Here is the relevant information about the population: Number of Permits Fraction of Households 0 0.4 1 0.3 2 0.3 A sample size of n = 3 is being considered. (a) Find the sampling distribution of the sample standard deviation. Use it to find the probability that the sample standard deviation is 0. (b) Find the sampling distribution of the sample range. Use it to find the probability that the sample
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Unformatted text preview: range is 0. (2) What is the standard error (s.e.)? In general, what factors influence the size of the s.e.? Explain why a small s.e. is preferable. (3) What is ) ( X P if you draw a sample of size 25 from a standard normal population? Show your work and explain. (4) Suppose you drew two independent samples each with sample size equal to 10 from the exact same uniform population. What is the probability that the sample means would be equal? Show work and explain....
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