Question: Suppose data collected by observers at randomly selected intersections across the country revealed that in a sample of 80 drivers, 20 were using their cell

Suppose data collected by observers at randomly selected intersections across the country revealed that in a sample of 80 drivers, 20 were using their cell phone.

a) Give a point estimate of p, the true driver cell phone use rate (that is, the true proportion of drivers who are using their cell phone while driving).

b) Compute a 99% confidence interval for p.

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