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The states you have identied lie close together on the plot. To see if they are inuential as a group, find the regression line with all of these states removed from the calculation. Draw this new line on your plot. Was this group of states inuential?
The number of hurricanes that are formed during each hurricane season can be modeled using the Poisson probability distribution. History suggests that the average if number of hurricanes formed during a year is 6.0 hurricanes.
iven an infinite population with a mean of 75 and a standard deviation of 12, the probability that the mean of a sample of 36 observations taken at random from this population exceeds 78 is?
Which one of these statements concerning the creation of frequency tables for integer data is true? The procedure for creating them is the same as that for creating tables for qualitative data.
The residuals for Alaska in the original regression is above 50. Explain why it is not generally informative to judge the unusualness of an observation purely by the magnitude of its residual?
Suppose that the mortgage payments of all homeowners have a normal distribution. What is the mean monthly mortgage paid by all homeowner?
Calculate a 95 percent confidence interval for the mean percentage share of billing volume from network television for the population of all US advertising agencies.
Historical data suggests a standard deviation in the first sample of 10 and a standard deviation in the second sample of 16. Find a 95% confidence interval for the population difference.
Using your answers to the earlier parts of this question, explain how the sample size affects the mean and SD of the sum of a collection of random variables. Limit your answer to 2-3 sentences.
Carry out a hypothesis test to see if this claim may be refuted. State the null hypothesis and the alternative hypothesis that we would use for this test.
Suppose the weight of a product is normally distributed with a mean of 1.5 and a variance of 0.2. What percentage of products will have weights within +/- 3 standard deviations? Critically discuss the lower and upper limits bounding 50% of product we..
A mean score on a standardized test is 50 with a standard deviation of 10. Answer the following:
let Xn be number of people selected until first person with non-blue eyes shows up, and let X be number of people select until first person with different eye color to preceding people shows up. Find out E(Xb), E(Xn) and E(X).
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