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Interpreting Calculator Display The Insurance Institute of America wants to estimate the percentage of drivers aged 18-20 who drive a car while impaired because of alco- hol consumption. In a large study, 42,772 males aged 18-20 were surveyed, and 5.1% of them said that they drove in the last month while being impaired from alcohol (based on data from "Prevalence of Alcohol-Impaired Driving," by Liu, Siegel, et al, Journal of the American Medical Association, Vol. 277, No. 2). Using the sample data and a 95% confidence level, the TI-83 Plus calculator display is as shown.
a. Write a statement that interprets the confidence interval.
b. Based on the preceding result, does alcohol-impaired driving appear to be a problem for males aged 18-20? (All states now prohibit the sale of alcohol to persons under the age of 21.)
c. When setting insurance rates for male drivers aged 18-24, what percentage of alcohol-impaired driving would you use if you are working for the insurance company and you want to be conservative by using the likely worst case scenario?
in a random sample of five microwave ovens the mean repair was 80.00 and the standard deviation was 11.50. assume the
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suppose that contamination particle size in micrometers canbe modeled as fx 2x-3nbspfor 1ltx and fx 0 for xlt 1a
The article can be on Descriptive Statistics, Probability and the Normal Distribution, Sampling and Sampling Distributions, Regression Analysis, or Time Series Forecasting.
Gerald takes the ACT Assessment mathematics test and scores 27. ACT math scores for 2007 were Normally distributed with mean 21.0 and standard deviation 5.1. What is Eleanor's standardized score?
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