Question
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of35records
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of35records of automobile driver fatalities in Kit Carson County, Colorado, showed that18involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use= 0.01.Solve the problem using both the traditional method and theP-value method. Since the sampling distribution ofpis the normal distribution, you can use critical values from the standard normal distribution as shown in thetable of critical values of thezdistribution. (Round the test statistic and the critical value to two decimal places. Round theP-value to four decimal places.)
test statistic | = | |
critical value | = | |
P-value | = |
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