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Most major airlines allow passengers to carry two pieces of luggage (of a certain maximum size) onto the plane. However, their studies show that the more carry-on baggage passengers have, the longer it takes to unload and load passengers. One regional airline is considering changing its policy to allow only one carry-on per passenger. Before doing so, it decided to collect some data. Specifically, a random sample of 1,000 passengers was selected. The passengers were observed, and the number of bags carried on the plane was noted. Out of the 1,000 passengers, 345 had more than one bag.
The domestic version of Boeing's 747 has a capacity for 568 passengers. Determine an interval estimate of the number of passengers that you would expect to carry more than one piece of luggage on the plane. Assume the plane is at its passenger capacity.
(171.651, 216.214)
(181.514, 208.313)
(174.412, 217.218)
(179.20, 212.716)
One measure of the overall sampling error in the entire distribution of sample means is the
Construct a 95% confidence interval for the true average amount of time customers spent in the restaurant. With a .95 probability, how large of a sample would have to be taken to provide a margin of error of 2.5 minutes or less?
a teacher gives a reading skills test to a third-grade class of n 25 at the beginning of the school year. to evaluate
Shipment costs are given in table below. Where no cost is provided, shipments are not possible. Where costs are given, shipments are possible in either direction. Sketch network model for this problem.
For each variable, identify the kind of graph that should be used to display the distribution of scores (histogram, polygon, or bar graph).
David Gallano, a wine merchant, has collected opinions on grape wine quality from a sample of his customers. These customers tasted wine made from grapes grown in three regions of the country.
the number of lightning strikes on a square kilometer of open ground in a year has mean 6 and standard deviation 2.4.
winning the jackpot in a particular lottery requires that you select the correct four numbers between 1 and 33 and in a
If the life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age?
Two servers with lambda 1 & lambda 2 service times exponentially distributed. Pat waits in a line to get served by any of the two servers. What is the waiting time of pat if no one is on the line?
Suppose that a survey is being planned for purposes of estimating the average number of hours spent exercising daily by adults (18 years of age or older) living in a certain community.
SmartPeople is an organization that only admits people with IQ's in the top 98 percentile. What IQ score would a person need to be a member of SmartPeople?
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