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Suppose that we had data on per capita GNP9measured in US dollars) for a sample of developing countries, and that these data were normally distributed with a mean of $ 1750 and a standard deviation of 300. What's the probability that a randomly selected state has a per capita GNP at or below $950?
A researcher estimates an AR(1) model with an intercept and finds that the OLS estimate of Beta1 is 0.95, with a standard error of 0.002.
Find out the probability that temperature of oven will range from 460 to 470 F?
Calculate separate confidence intervals for the numbers of days absent for Clinic A and Clinic B, respectively.
Find the probability that the mean wieght of these 400 bags exceeds 16.6 ounces.
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p -value.
Create a 98 percent confidence interval for the population mean.
Assume you are given data from a survey showing the IQ of each person interviewed and the IQ of his or her mother. That is all the information you have.
What the degree of freedom tells us? What are the degree of freedom for t- test, X^2-test, and for F-twst?
Assume that the population proportions are to be estimated from the samples described. Find the margin of error and the 95% confidence interval.
Develop a stem-and-leaf chart. Summarize the number of times each ATM was used. What was the typical, minimum, and maximum number of times each ATM was used?
Determine the likelihood of accepting a lot which is 1% defective?
A discussion of extreme weather reports that: "In most states, hurricanes occur infrequently. Yet, when a hurricane hits, the losses can be catastrophic.
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