Your game publishing company is looking to find out how much lower-income users spend each month on average on a game’s in-app purchases so that they can make marketing decisions. You managed to collect 404 valid survey responses and calculate the mean monthly purchase amount as $5.93. From past studies of this nature, you know that the standard deviation is $1.05. Construct a 99% confidence interval to estimate the average monthly purchases of lower-income players. The lower limit is

The upper limit is

Sara needs to take a taxi to get to the movies the taxi charges $4.00 for the first mile and then $2.75 for each mile after that if the total charge is $20.50 then how far was sara’s taxi ride to the movie

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.