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In a recent survey, 61% of the community favored building a police substation in their neighborhood. If 14 citizens of the neighborhood are chosen. A. Find the probability that exactly 12 of them favor building the police substation.
Employees of a local company are classified according to gender and job type. The following table summarizes the number of people in each job category.
Construct a 99% confidence interval (Konfidenz interval) for the difference in proportions of all adults and all teenagers who watched the program and liked it.
Federal administration stated that unemployment level in US is 8.6% (population proportion = 0.086). A hypothesis test is to be performed to decide whether unemployment level in NY State differs from national level.
Black Hole Pizza Parlor instructs its cooks to put a "handful" of cheese on each large pizza. A random sample of six such handfuls were weighed.
Suppose you decided to switch from a 99 to a 95 percent confidence interval. Without performing any calculations, will the interval increase, decrease, or stay the same? Which f the values in the formula will change?
Assume that causes of heart failure between individuals are independent. What is the probability that three individuals have conditions caused by outside factors?
At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
Twelve doctor's offices were given 3 lab inspections with the following results:
At the end of a year the change in participants' blood pressure over the year was measured, and the change was compared for the two groups.
Determine the expected market return on $ 20,000 if the expected return on asset is 20%, its beta is 1.5, and the risk free rate is 5 percent?
Use the five steps of hypothesis testing to determine whether the observed differences in the number of activities in the following table performed by the three groups are statistically significant at the .05 level of significance. Clearly indicat..
Use the p-value approach and test to determine if the average yearly income of marketing managers in the East is significantly different from the West.
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