9.75 LSAT Ethnicity and Law The Law School Admissions Test (LSAT) is a multiple-choice test that most (at least those in North America) prospec- tive law students must take in order to apply for law school. The test comprises five 35-minute-long sections. The LSAT score is a three-digit number ranging from 120 to 180. The following table provides the overallational average for each category for Fall 2005 applicants.24

To test the above information regarding Black applicants, suppose that 100 Black students from the year 2005 pool were randomly selected and their GPA and LSAT scores recorded in the following table.

a. Do the data provide sufficient evidence to indicate that the average GPA score for all Black applicants is different from the overall average? Test using a = 0.05.

b. Do the data provide sufficient evidence to indicate that the average LSAT score for all Black applicants in the class of 2005 is different from the national average? Test using a = 0.05.

c. Could you use this date to determine if there is a dif- ference between the average GPA and LSAT scores for all Black applicants in 2005? Explain your answer.

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Ethnic Group Average GPA Average LSAT Asian 3.10 155 White 3.15 153 Hispanic 3.0 147 Chicano 2.9 146 Black 2.71 142