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In the week before and the week after a holiday there were 10,000 total deaths and 4979 of them occcured in the week before the holiday.
a. Construct a 90% confidence interval estimate of the propotion of deaths in the week before the holiday to the total deaths in the week before and the week after the holiday
b. Based on the result does there appear to be any indication taht people can temporarily postpone their death to survive the holiday?
Using the Wilcoxon Signed-Ranks Test. Paired sample data and use the Wilcoxon signed-ranks test to test the claim that the matched pairs have differences that come from a population with a median equal to zero.
A sample of 400 individuals participated in the taste test and 80 indicated they like the taste. At a 5% significance level, test to determine if at least 22% of the population will like the new soft drink.
in an inertia welding experiment a sample of 50 welds were tested. the sample mean and sample standard deviation of the
Use the t test to determine whether the slope of the regression model is significant at α = 0.05.
suppose that 13 of all steel shafts produced by a certain process are nonconforming but can be reworked rather than
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A state representative is reported as saying that about 10% of reported auto thefts involve owners whose cars have not really been stolen, but who are trying to defraud their insurance company.
In light of these data, are the percentages of divorcing couples with prenuptial agreements equal in these four places?
The graduates find a job within 1 year of graduating. What is the probability that among 9 randomly selected graduates, at least 1 finds a job within 1 year.
Harrington Health Food stocks 5 loaves of Neutro-Bread. The probability distribution for sales of Neutro-Bread is listed in following table. How many loaves will Harrington sell on average?
Discuss how the Empirical Rule works and how it relates to the bell curve. Then, explain Chebyshev's Theorem and how it is different from the Empirical Rule.
the annual incomes of the five vice presidents of ellys industries are 41000 38000 32000 33000 and 50000. the annual
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