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Public Policy and Political Science
The U.S. Product Safety Commission issues playground specifications and guidelines to help communities build safe playgrounds. One concern is the uncompressed depth of wood chips and other loose-fill material (used as shock absorbers). Independent random samples of playgrounds in various cities were obtained, and the uncompressed depth of wood chips (in inches) was measured for each playground. The data are given in the following table.
Assume the underlying distributions of uncompressed depths are continuous. Is there any evidence to suggest that the populations are different? Use a = 0.05, and find bounds on the p value associated with this test.
Determine her completion time so that only 10% of the students doing the test will take longer than her? For a set of 5 randomly selected tests (each with 10 questions), what is the probability that her mean completion time will be 14 minutes or mo..
Suppose you want to model the age y of onset of the disease as a function of number x of repeat gene sequences in SCA1 chromosomes. Propose a quadratic model for y.
an experiment consists of tossing three unfair coins where the probabilty of tossing a head on each is 25. construct
a bus passes by a certain street corner every morning around 900 a.m. let x be the difference in minutes between the
Analysis of how hypothesis testing and the use of confidence intervals are the same and analyze how these are different.
A normal distribution has a mean of µ = 70 with σ = 12. If one score is randomly selected from this distribution, what is the probability that the score will be less than X = 55?
In 2006 the U.S. Internal Revenue Service (IRS) received 132,275,830 individual tax returns (The 2008 New York Times Almanac). The actual number of each type of individual return received by the IRS in 2006 is given below:
Explain probability distribution of X (name and parameters).
in the linear programming formulation of the shortest route problem there is one constraint for each node indicatinga.
suppose there are three bills in a wallet. one of thebills is a 1 one is a 5 and one is a 10 bill. you selecttwo bills
The Hersh Corporation is considering two word processing systems for its computers. One factor that will influence its decision is the ease.
Follow daily stock price quotations in the Wall Street Journal for a pair of stocks of your choice, and compute the sample correlation coefficient.
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