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For Christmas a teacher of a class of n children asks their parents to leave a present under the Christmas tree in the classroom. The day after each child picks a present at random. The problem is related to computing the expected number of children that end up getting the present bought by their own parents.
a. What is the pmf for the indicator random variable I_i corresponding to the event kid I gets the present bought by their own parents?
b. Are I_i and I_j independent if i does not equal j? Justify your answer.
c. What is the expected number of children that end up getting the present bought by their own parents?
Find a two-sided 90% confidence interval for µ. One can be 90% confident that the true average blood pressure µ for that person is between a and b.
Policy Pollsters is a market research firm specializingin political polls. Records indicate in past elections,when a candidate was elected, Policy Pollsters hadaccurately predicted this 80 percent of the time andthey were wrong 20% of the time.
Energy 2007. A Gallup poll in March 2007 asked 1005 U.S. adults whether increasing domestic energy production or protecting the environment should be given.
What is Super Tea company expected dividend stream over the next three years?
find the numerical value of the following factors using a interpolation b the formula and c a spreadsheet function.1.
A sample of n=10 in each treatment. For this study, the three samples have SS1=10, SS2=20, and SS3=15. What value would be obtained for MSwithin?
Nonpoint source loads are chemical masses that travel to the main stem of a river and its tributaries in flows that are distributed over relatively long stream reaches, in contrast to those that enter at well-defined and regulated points.
Why is it important to have not only claims information but also EMR data when evaluating quality? Give examples of some national quality organizations.
Suppose that daily gross income is normally distributed. Determine the relative frequency corresponding to daily gross income of $520 or more?
If we are interested in job satisfaction. Name a variable that correlates with job satisfaction but we do not have causation.
How many nickels does a coin counter manufacturer need to weigh so that she can be 98% confident that her sample mean is within 25 milligrams of the true average weight of a nickel?
according to the national association for college admissions counseling and usa today. 19.8 of college students take at
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