In spite of the potential safety hazards, some people would like to have an Internet connectionin their car. A preliminary survey of adult Americans has estimated this proportion to besomewhere around...

In spite of the potential safety hazards, some people would like to have an Internet connectionin their car. A preliminary survey of adult Americans has estimated this proportion to besomewhere around 0.30 (​USA TODAY​, May 1, 2009).

(a)Use the given preliminary estimate to determine the minimum sample size required toestimate the proportion of adult Americans who would like an Internet connection in theircar to within 0.02 with 95% confidence.(b)Use the given preliminary estimate to determine the minimum sample size required toestimate the proportion of adult Americans who would like an Internet connection in theircar to within 0.02 with 99% confidence.