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An urban planning group is interested in estimating the difference in mean household income between two neighborhoods. They obtain the 95%confidence interval below, 95%CI for difference(-5693,-4107) Show work. Which is true?
a. This is paired design,
b. There is no significant difference in the mean household incomes between the two neighborhoods +0.05
c. There is difference
d. I only, both I andII, II only,Both Iand III,IIIonly
Create a 95 % confidence interval for the true mean. Why might normality be the issue here?
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What is the maximum error of estimate for p ?
Construct a 95% confidence interval for the proportion and calculate the P value for the given test.
The following data provided by a coffee company are the roast time in minutes for five batches of coffee (x) and the resulting shrinkage in percent of the coffee weight(y).
First explain what the Gini coefficient is and what hypothetical Gini values of 0 and 1 mean. Sort the data by the Gini coefficient in 2000 and look at the list of countries.
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