Trainload of cars and trucks is in route to an auto dealer for whom you work. before they arrive the dealers receives and invoice showing 160 vehicles but the part of the invoice showing how many of each kind of the vehicle has been torn off. your boss needs to know how many of each before they arrive. the invoice shows a total mass of 182,800 kilograms of vehicles. each truck is 1,400 kilograms and each card is 1,000 kilograms. how many of each kind are there.

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In a recent telephone survey, 5,000 randomly selected teenagers were asked to cite their primary social network site. six of 10 teenagers said they use mybook as their primary social network site. a 95% confidence interval to estimate the true proportion of teenagers who use mybook as their primary social network site is found to be (0.2964, 0.9036). which of the following is a correct interpretation of the confidence level? ninety-five percent of all samples of this size would yield a confidence interval of (0.2964, 0.9036). there is a 95% chance that the true proportion of teenagers who use mybook as their primary social network site is in the interval (0.2964, 0.9036). ninety-five percent of the time, the procedure used to generate this interval will capture the true proportion of teenagers who use mybook as their primary social network site. ninety-five percent of all the samples of size 5,000 lie in the confidence interval (0.2964, 0.9036).