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Suppose prior elections in Louisiana indicated it is necessary for a candidate for governor to receive at least 80 percent of the vote in the northern part of the state to be elected. The incumbent governor is interested in assessing his chances of returning to office and conducts a survey of 2,000 registered voters residing in the northern part of the state. The random sample finds that 75% willing to vote for the governor. His campaign manager says, "Don't worry! This is not an significantly less percentage." The governor calls you, as he knows you are a statistical wizard and asks if he can be 95% sure that he is within striking distance.
Clouds were randomly seeded or not with silver nitrate. Rainfall amounts were recorded from the clouds. The purpose of the experiment was to determine if cloud seeding increases rainfall. The following data is obtained:
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
Describe what you find then produce an ANOVA for the problem.
A manufacturer of dodge balls uses a machine to inflate its new balls to a pressure of 13.5 pounds (σ =0.1). When the machine is properly calibrated, the mean inflation pressure s 13.50 pounds, but uncontrollable factors can cause the pressure of ..
Determine the largest village in terms of the population?
Find the value of the standard normal random variable z, called z 0 such that:
A portfolio manager believes that tomorrow's foreign exchange rate of German marks per US dollar will be Normally distributed with mean 2.03 and standard deviation 0.08. Using the manager's numbers:
What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 5 of µ? Use the value 20 for the population standard deviation of scores on this subsection.
An independent researcher has decided to study variations in TV viewing habits among three American cities. She has managed to randomly sample households in Chicago, Atlanta, and Minneapolis and gather data on the daily "on" times for households o..
A group of day to day workers can work either 0 hours, eight hours or 12 hours at a pay rate of $9.75 per hour. (The 12 hour day pays regular time for the first eight hours and double time for the remaining four hours.
Let X 1 , X 2 , X 3 , X 4 be a random sample from a Poisson distribution with parameter λ and let Y = X 1 + X 2 + X 3 + X 4 . You decide to test λ = 1.60 versus λ
Otherwise, no ordering will take place. Find the steady-state probabilities of the state of this Markov chain?
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