2) A random roadside survey of drivers in Oklahoma measured information about se

Question

2) A random roadside survey of drivers in Oklahoma measured information about sex, age and drinking behavior The table below shows the data on drivers under the age of 20 who had been drinking within the two hours before driving. Compare the probability that a male had been drinking to the probability of a female had been drinking and report the results of your comparison in two decimal places Q: Did you drink alcohol in the last 2 hours? Male 17 122 139 Female 76 404 480 Total Yes 93 526 No Total 619 ide an appropriate response. 3) When 460 Junior college students were surveyed, 100 said they have a passport. Construct a 95% confidence interval for the proportion of junior college students that have a passport. Round to the nearest thousandth. 4) A survey of 500 non-fatal accidents showed that 141 involved uninsured drivers. Construct a 99% confidence interval for the proportion of fatal accidents that involved uninsured drivers. Round to the nearest thousandth.

Explanation / Answer

#3.

#4.

n 460 p 0.217391304 z-value of 95% CI 1.9600 SE = sqrt(p*(1-p)/n) 0.01923 ME = z*SE 0.03769 Lower Limit = p - ME 0.17970 Upper Limit = p + ME 0.25508 95% CI (0.1797 , 0.2551 )

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