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Unformatted text preview: satistic? Give an example? Q. 9: Central Tendency in sample; the sample mean. Q. 10 What is a random sample and its sample size? Q. 11 What is a sample variance? Give an example? Q. 12 A comparison of coﬀee prices at 4 randomly selected in HCM City showed increases from the previous month of 12, 15, 17 and 20 thousands VND for a kilogram bag. Find the variance of this random sampleof price increases. Q. 13 All examples in this Chapter and Exercises: 19 p. 200; 915 p.216; Q. 14 What is tdistribution? Q. 15 using table A.4 study examples 8.118.14. Q. 16 What is tdistribution used for ? Chapter 9: One and twosample estimation problems Q. 17 What is estimation of population parameters? Give anexample? Q. 18 Deﬁnition of an unbiased estimator? Q. 19 What is the interval estimation? Conﬁdence interval of μ ; σ known 1 (unknown)? Study Examples 9.2; 9.3; 9.4. Q. 20 Solve exercises 120, p. 245246. 2...
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 Spring '09
 thu
 Normal Distribution, Probability, Standard Deviation, Variance, Probability distribution, Probability theory, probability density function

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