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Question: In the situation of problem 15-8, another sample of 20 flights reveals that 18 of them are full. Obtain the second posterior distribution of the proportion of full flights. Graph the prior distribution of problem 15-8, as well as the first posterior and the second posterior distributions. How did the distribution of the proportion in question change as more information became available?
Problem: American Airlines is interested in the proportion of flights that are full during the 2008 summer season. The airline uses data from past experience and constructs the following prior distribution of the proportion of flights that are full to capacity :
S P(S)
0.70 0.1
0.75 0.2
0.80 0.3
0.85 0.2
0.90 0.1
0.95 0.1 1.0
A sample of 20 flights shows that 17 of these flights are full. Update the probability distribution to obtain a posterior distribution for the proportion of full flights.
The average weight of the sample is 10.2 g. From past shipments, it is known that the standard deviation of weight among mice is 2 g. Find a 95% confidence interval for the mean weight of all the mice in the shipment.
Is the sampling distribution model for the sample proportion likely to be Normal? Explain.- What are the mean and standard deviation of this sampling distribution model?
The report on this survey claims that this is not significantly different from the percentage (33%) who said they ordinarily get their science news.
You are a restaurant manager. You must pick 13 entrees for your menu. There are 11 meat offerings and 7 poultry offerings to choose from. (a) In how many ways can 13 entrees be randomly selected out of the 18 meat and poultry offerings? Show..
News reports claimed this study proved that swimming can prevent depression. Explain why this conclusion is not justified by the study. Include an example of a possible confounding variable.
Test at the 5% level whether the incidence of smoking depends on the age category
One purpose of displaying data graphically
Determine a pipeline system that will connect all 10 cities using the minimum number of miles of pipe, and indicate how many miles of pipe will be used.
For the data set shown? below, complete parts ?(a) through ?(d) below.
RELIABILITY OF SECURITY SYSTEMS Before being allowed to enter a maximum-security area at a military installation, a person must pass three independent.
a companys construction time follows a normal distribution. the mean time to construct a building is 100 days and the
a binomial experiment which has the probability of success for one trial p 0.63 is being observed and 70 trials are
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