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To identify the need for services in the coming summer months, the mayor wants to identify potential high crime areas of the city and the citys need for detention facilities for men and women. The mayor suggests looking at data for the next 200 people taken into custody. From his statistics course, he says that a sample size of 200 should be sufficient. From your knowledge of statistical analysis would you suggest a different sampling plan? If yes, what would you suggest?
Is there a significant difference in sales dollars of hats between the west side and east side stores at the 5 percent level of significance? (a) State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic and stat..
Which represent errors of estimation for individual points, an alternative way to examine the error of the regression model using a single measurement is to determine the sum of all the residuals.
If customers arrive according to a non-stationary Poisson process with rate function λ(t) = sin(t) + 5, is the time between the arrivals an exponential distribution?
A coin tossed 100 times and 530 heads appear. At a=0.05, test the claim that this is a non biased coin. Use a P-Value. does this suggest the coin is fair?
in one trip of a cruise ship 341 of the 3745 passengers became ill with norovirus. at about the same time 260 of the
a) Find the marginal density of Y. b) Find E(X) HINT: What is E (X|Y=y) ?
A medical researcher estimates that no more than 55% of the U.S. adults eat breakfast every day. In a random sample of 250 U.S. adults, 56.4% say that they eat breakfast every day.
wasserman and wadsworth 1989 discuss a process for the manufacture of steel bolts that continuously feed an assembly
two cards are drawn at random from an ordinary deck of 52 cards. determine the probability that both cards are hearts
use the normal distribution of sat critical reading scores for which the mean is 500 and the standard deviation is 108
let q be a random variable which is uniformly distributed between 0 and 1. on any given day a particular machine is
find the unexplained variation for the paired data. the paired data below consists of test scores and hours of
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