ECON2P91_ReviewQuestions_No1_Fall2009

# ECON2P91_ReviewQuestions_No1_Fall2009 - Y E Y Y Y = = = ∑...

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1ECON2P91: Review Questions No. 1 1. Complete the following formulas Standard error of the mean: SE Y ( ) = ...... 90% confidence interval for the mean: Y ± ...... 95% confidence interval for the mean: Y ± ....... 99% confidence interval for the mean: Y ± ....... the t-statistic for single means: ( 29 t Y SE = - . . . . . . (. . . ) Standard error of the difference between two means: SE Y Y ( ) 1 2 - = ....... 90% confidence interval for the difference between two means: ( ) . . . . . Y Y 1 2 - ± 95% confidence interval for the difference between two means: ( ) . . . . . Y Y 1 2 - ± 99% confidence interval for the difference between two means: ( ) . . . . . Y Y 1 2 - ± the t-statistic for the difference between means: t Y Y SE = - - ( ) . . . . . (. . . ) 1 2 Expected value (or mean) of a discrete random variable: E Y Y ( ) . . . = = μ Variance of a discrete random variable: Var

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Unformatted text preview: Y E Y Y Y ( ) ( ) . . . = = - = ∑ σ 2 2 • Expected value (the mean) or sampling distribution of the mean: E Y ( ) . . . = • the correlation between X and Y: Corr X Y Cov X Y ( , ) ( , ) ? = • E(X+Y)=E(X)+. .. • Var(X+Y)=Var(X)+Var(Y)+. .. 2. Page 60 q. 2.10 3. Page 60 q. 2.11 4. Page 60 q. 2.12 5. Page 60 q. 2.14 6. Page 61 q. 2.15 7. Page 100 q. 3.6 8. Page 100 q. 3.8 9. Page 101 q. 3.10 10. Page 101 q. 3.12 11. Page 101 q. 3.13 1 12. Explain the meaning of the following concepts • Expected value of a random variable • The Central Limit Theorem • The Law of Large Numbers • Covariance • Correlation coefficient • P-value (or significance probability) • Standardizing a variable • Standard normal distribution 2...
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## This note was uploaded on 04/28/2011 for the course ECON 2P91 taught by Professor Ogwang during the Winter '09 term at Brock University.

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ECON2P91_ReviewQuestions_No1_Fall2009 - Y E Y Y Y = = = ∑...

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