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As of october 2009, the united states federal dept was $11,963,668,027,500. If each of the 307,000,000 people in the United States paid an extra $1000 in taxes each year, every year, how many years would it take to pay off this debt?
State the null hypothesis and alternative hypothesis. Indicate the type of test to be performed (left-tailed, right-tailed, or two tailed). Provide a statement in terms of the hypothesis testing process in this problem that would signify a Type I ..
The food distributor selects a sample of stores located in areas where he believes the shoppers are receptive to trying new products. What type of sampling does this represent?
If the probability of making a two point shot is greater than the probability of making a three point shot, why do coaches allow some players to shoot the three point shot if they have the opportunity? Use expected value to explain your answer.
Normally distributed with a mean of $ 1750 and a standard deviation of 300. What's the probability that a randomly selected state has a per capita GNP at or below $950?
What is the null hypothesis? Use a = 0.05 .
Suppose you are given a grant to run a controlled experiment. Explain how you would structure the experiment in order to estimate the casual effect of hours on sat.
Find the mean and standard deviation for the numbers of boys in groups of 51. b) Is the result of 39 boys unusual? Does it suggest that the gender-selection method appears to be effective?
What is the probability that among 10 true hypertensives at least 50% are being treated appropriately and are complying with this treatment?
A poll of U.S. health professionals revealed 82% would choose the same career. In a hypothesis test conducted at a level of significance of 5%, a P-value of 0.023 was obtained.
In the study of 15 taxi drivers, average experience was 11.2 years. Standard deviation was 2. At α = .10, is number of years' experience of taxi drivers really less than taxi company claimed?
Choose the proper conclusion regarding the claim that the population have different variances.
Where Z~N(0,1). Also let [empty set symbol] denote the standard normal density function. Show that, d/dx [empty set symbol] (- square root of x) = -1/2 x^-1/2 [empty set symbol] (-square root of x).
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