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Assume the following probabilities:
P(Customer makes a purchase) = 0.450
P(Customer does not make a purchase) = 1- 0.450
Compute the probability that both customers purchase (# purchases = 2), and enter your answer with 3 decimal places.
The histograms of some sampling distributions are symmetrical. T-F What would make a histogram symmetrical, and give an example of a symmetrical distribution? A random sample of size 36 is to be selected from a population that has a mean μ = 50 an..
A die is made of a cube with a square painted on one side, a circle on two sides, and a triangle on three sides.
Let Y, Y2 denote the order statistics of a random sample of size 2 from a distribution which is N(µ, u2), where u2 is known.(a) Show that Pr ( Y1 µ Y2 ) = !and compute the expected value of the random length Y2 - Y, .
Proceeds ¼=$1.25 million. PV of forgone cash flows The NPV from selling the project is $1,250,000- $1,083,333 = $166,667. Therefore, selling the project is feasible.
What, in your considered judgement, were the three most significant political developments during the latter half of the 20th century.
The pitching2005 data set in the fastR package contains 2005 season statistics for each pitcher in the major leagues.
A permutation resample for a two-sample test
Exercise 11 The accompanying table gives sample means and standard deviations, each based on n = 6 observations of the refractive index of fiber-optic cable. Construct a control chart, and comment on its appearance
A sample of 64 account balances from a credit card company showed an average balance of $1,040. A previously determined population standard deviation is $200.
Describe the overall shapes of these distributions.- How do the distributions differ?- Look carefully at the bar definitions. Where do these plots violate the rules for statistical graphs?
A researcher conductued a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he ..
A psychologist operating a group home for delinquent adolescents needs to show that the home is successful at reducing delinquency. He samples 10 adolescents living in their own homes who have been identified by the police as having problems, 10 s..
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