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The county government in a city that is dominated by a large state university is concerned that a small subset of its population have been over utilized in the selection of residents to serve on county court juries. The county decides to determine the mean number of times that an adult resident of the county has been selected for jury duty during the past 5 years. They will then compare the mean jury participation for full-time students to nonstudents.
a. Identify the populations of interest to the county officials.
b. How might you select a sample of voters to gather this information?
if 42 of registered voters in a country are registered democrat and we select 8 random voters what is the probability
a seed company claims that its variety of seeds has a 90 germination rate. for a sample of 800 seeds 700 germinated.
Hypothesis test of the claim has been conducted and that the conclusion of the test was to reject the null hypothesis. Identify the population to which the results of the test apply.
find the value of the standardized z-test statistic. test ho p 0.75 verses ha pgt0.75 when the sample has n20 p0.78 and
Sampling. A sample is chosen randomly from a popu- lation that can be described by a Normal model. What's the sampling distribution model for the sample mean? Describe shape, center, and spread.
stephanie robbins is the three hills power company management analyst assigned to simulate maintenance costs. in
70% of all americans can do routine computations. If an employer were to hire 8 randomly selected americans, determine the probability distribution.
What is the probability that at least two of the three vice presidents can attend the meeting?
In a semi-Markov process, let tij denote the conditional expected time that the process spends in state i given that the next state is j. (a) Present an equation relating μi to the tij .
in a sample of 400 people 250 indicated that they prefer domestic wines while 140 said they prefer european wines and
By usingu(x, t) = X(x)T(t) or u(x,y, t) = X(x)Y(y)T(t), separate the following PDEs into two or three ODEs for X and T or X, Y, and T. The parameters c and k are constants. You do not need to solve the equations.
let x be normally distributed random variable with mean u and variance s2 4.84. determine the the size of the sample
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