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A sample of 18 widgets has a mean of 37.300 and standard division 8.150. At 99% confidence, the upper limit with 3 decimal places is?
A local business knows that 30% of their customers use a credit card to pay for their purchase. Suppose a sample of 85 customers is selected.
Find a 95% confidence interval for the difference between the mean amount of the highest cost item purchased for the High customer category.
the visibility standard index vsi varies from 0 excellent to 200 very bad. denvers mean vsi is 90 with a standard
assume that a random sample is used to estimate a population proportion p. find the margin of error e that corresponds
Consider the use of metal detectors in airports to test people for concealed weapons. In essence, this is a form of hypothesis testing.
(Class Project) Let each student in the class be cross-classified on the basis of gender (male, female) and current employment status (yes, no).
nearly every aspect of our lives is impact by waiting on lines queues including grocery stores waiting at red lights
All voters of Milwaukee County were asked a week before election day whether they would vote for a certain presidential candidate. Of these, 48% answered yes.
Tommy's allowance is $5.50 per week. How much is that using the least number of dollars and dimes
In the Sci Tools example, use a two-way data table to see how (or whether) the optimal decision changes as the bid cost and the company's production cost.
The area between .58 standard deviations above the mean and 1.94 standard deviations above the mean .58=.2190 and 1.94=.4738.
Is there evidence that a stock split causes excess returns for the month following the split? Redo the problem, using the sign test. Compare the results of the sign test with those of the Wilcoxon test.
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