1.confidence interval for using the following information:Ages of people driving in the freeway's left lane with their turn signal permanently on: n = 27, years, s = 4.2 years; with 99% confidence. sentence that explains the interval.

2.From the previous problem, how many drivers would you need to survey to estimate to within 10% of its true value, using 99% confidence?

3.Suppose you are in the lucrative energy drink business.You sample 10 cans of your product to see how full they are and finds s = .04.Test the claim that the population standard deviation of the fill measurements is less than 0.1 ounce.