A researcher wishes to estimate the average blood alcohol concentration (BAC) for drivers involved in fatal accidents who are found to have positive BAC values. He randomly selects records from 51 such drivers in 2009 and determines the sample mean BAC to be 0.17 g/dL with a standard deviation of 0.060 g/dL. Complete parts (a) through (d) below. (c) Determine and interpret 90% confidence interval for the mean BAC in fatal crashes in which the driver had positive BAC. Select the correct choice below and fill in the answer boxes to complete your choice. (Use ascending order. Round to three decimal places as needed.) OA. The researcher is OB. The researcher is OC. There is a % confident that the population mean BAC is not between % confident that the population mean BAC is between % probability that the population mean BAC is between and for drivers involved in fatal accidents who have a positive BAC value. and for drivers involved in fatal accidents who have a positive BAC value. for drivers involved in fatal accidents who have a positive BAC value. and

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