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A law enforcement agent believes that at least 88% of the drivers stopped on Saturday nights for speeding are under the influence of alcohol. A sample of 66 drivers who were stopped for speeding on a Saturday night was taken. Eighty percent of the drivers in the sample were under the influence of alcohol. a) State the null and alternative hypothesis. (2) b) What test statistics would you use to test the hypothesis above? (1) c) Find the appropriate critical value. Two decimals. (2) d) Calculate the test statistic and interpret your findings.
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