stat_final_review_2_fall09

stat_final_review_2_fall09 - 1 Stat Final- Review #2 #1)...

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1 Stat Final- Review #2 #1) Suppose that a researcher, using data on class size ( CS ) and average test scores ( TS ) from 202 third-grade classes, estimates the OLS regression: S T ˆ = 600 – 6×( CS ) R 2 = 0.8, SER = 7 a) What is the sample variance of test scores across the 202 classrooms? b) What is the sample standard deviation of test scores across the 202 classrooms? c) What is the explained sum of squares (ESS) of this regression?
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#2) estScore T ˆ = 690 - 4.3 × STR n= 600 (12.2) (2.2) a) In the regression above, robust standard errors appear in parentheses. Calculate the test statistic for the test of H 0 : β 1 = 0 against the two-sided alternative H a : β 1 0? Round your final answer to two decimal places if necessary. b) What is the P-value for this test? Calculate the P-value using the standard normal table. Use your final answer from part a. Round your answer to four decimal places. c) Do you reject the null hypothesis at the 5% level?
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This note was uploaded on 02/01/2010 for the course PAM 2100 taught by Professor Abdus,s. during the Spring '08 term at Cornell.

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stat_final_review_2_fall09 - 1 Stat Final- Review #2 #1)...

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