The College Board, administrator of the SAT test for college entrants, has made several changes to the
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a. Produce a time-series plot for the combined gender math SAT scores for the period 1980 to 2005. Indicate the time-series components that exist in the data.
b. Conduct a test of hypothesis to determine if the average SAT math scores of students continued to increase in the period indicated in part a. Use a significance level of 0.10 and the test statistic approach.
c. Produce a forecast for the average SAT math scores for 2010.d. Beginning with the March 12, 2005, administration of the exam, the SAT Reasoning Test, was modified and lengthened. How does this affect the forecast produced in part c? What statistical concept is exhibited by producing the forecast in part c?
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Related Book For
Business Statistics A Decision Making Approach
ISBN: 9780133021844
9th Edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry
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