According to the Educational Testing Service, the scores of people taking the SAT in 1980 were as
Question:
According to the Educational Testing Service, the scores of people taking the SAT in 1980 were as listed in Table 3.1. a Estimate the average and standard deviation of SAT scores for students whose families made at least $18,000 and for those whose families made no more than $6000. b Do these results have any implications for college admissions?
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TABLE 3.1 Data on SAT Scores Range 200-250 251-300 301-350 351-400 401-450 451-500 501-550 551-600 601-650 651-700 701-750 751-800 Number Having Family Income ≥$18,000 ************* * 325 4,212 13,896 26,175 37,213 41,412 37,400 28,151 17.992 9,284 3,252 415 Number Having Family Income <$6000 ***** HOTEL 3 Comman 1638 7980 9622 8973 8054 6663 4983 3119 1626 686 239 17
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To estimate the average and standard deviation of SAT scores for students whose families made at least 18000 and those whose families made no more than 6000 we need to calculate weighted averages and ...View the full answer
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Managerial Statistics
ISBN: 9780534389314
1st Edition
Authors: S. Christian Albright, Wayne L. Winston, Christopher Zappe
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