The National Highway Traffic Safety Administration found that, among the crashes with recorded times, EMS notification times exceeded 10 minutes in 19.4% of rural fatal crashes. A random sample of 500 reported fatal crashes in Kentucky showed 21.8% of the notification times exceeded 10 minutes. Construct the 95% confidence interval for the true proportion of fatal crashes in Kentucky whose elapsed notification time exceeded 10 minutes.
Answer to relevant QuestionsIn a poll conducted by Harris Interactive of 1179 video-gaming U.S. youngsters, 8.5% displayed behavioral signs that may indicate addiction. Using a 99% confidence interval for the true binomial proportion based on this ...Construct 90% confidence intervals for the binomial parameter p for each of the following pairs of values. Write your answers on the chart. f. Explain the relationship between the answers to parts a and b. g. Explain the ...Find the sample size n needed for a 95% interval estimate in Example Find the value of P for each of the hypothesis tests in Exercise 9.95; state the decision using a = 0.05 In Exercise 9.95 a. Ho: p = 0.70 Ha: p > 0.70 with the sample n = 300 and x = 224 b. Ho: p = 0.50 Ha: p < 0.50 with ...Consumer Reports conducted a survey of 1000 adults concerning wearing bicycle helmets. One of the questions presented to 25- to 54-year olds was whether they wear a helmet most of the time while biking or cycling. This was ...
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