In a 2006 article in chance data on stops and

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20. In a 2006 article in Chance , data on stops and searches of both African-American and white drivers by the Los Angeles Police Department from January through June 2005 were summarized as follows: of 61,688 African-Americans who were stopped, 19% were searched; of 106,892 whites who were stopped, 5% were searched. Construct a 95% confidence interval for the difference between the population proportion of African- Americans who were searched after being stopped and the population proportion of whites who were searched after being stopped. (Be careful not to round until the last step) z * multipliers for confidence intervals Multipliers CL Exact Rounded 90% 1.645 or 1.65 95% 1.96 or 2.00 98% 2.33 or 2.33 99% 2.575 or 2.58 *Use the Exact values for the problems on the exam.
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