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Suppose that scores on a particular test are normally distributed with a mean of 120 and a standard deviationof 16 . What is the minimum score needed to be in the top 20% of the scores on the test? Carry your intermediate computations to at least four decimal places, and round your answer to at least one decimal place.
You are given an annual time series with 40 consecutive values and asked to fit a fifth-order autoregressive model.
Find Probability of independent events.Consider again the auto repair rates described. If you own two cars, what is the probability that.
show that if x and y are independent poisson random variables with parameters lambda1 gt 0 and lambda2 gt 0 thenpx y
Cars pass a certain street location according to a Poisson process with rate λ. A woman who want to cross the street at that location waits until she can see that no cars will come by in the next T time units.
Should the hypothesis be accepted or rejected at the 5% level of significance that the production of acceptable items is independent of the hour of the morning in which they are produced?
This model is fit to the data using the method of least squares using statistical software, and the following parameter estimates and their standard errors are obtained.
What is your opinion: Does this study provide evidence that the postmortem serotonin levels are different between patients who die of heart disease and patients who die of other causes?
for a continuous random variable x p28 ? x ? 68 0.2 and px gt 68 0.11. calculate the following probabilities. leave
1. a candidate for one of ohios two u.s. senate seats wishes to compare her support among registered voters in the
A local fast-food restaurant has determined that 10% of drive-thru orders are filled incorrectly. Suppose 5 orders are randomly selected. What is the probability that more than one of the orders is filled incorrectly?
a health researcher is interested in determining whether or not the speed at which people walk is related to their
In order to get some uniformity in taste, it is better to randomly assign the trucks to the four plants. Develop a design using the random assignment procedure.
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