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Travel and Transportation
A super-commuter is a person who commutes to work from one large metro area to another by car, rail, bus, or even air. Super-commuters are not necessarily elite business travelers, but rather middle-income individuals who are willing to commute long distances in order to secure affordable housing or better schools. According to a recent study, 13% of workers in Houston are super-commuters, 8.6% in Phoenix, and 7.5% in Atlanta.50 Suppose three workers are selected at random, one from each city.
a. What is the probability that all three are super-commuters?
b. What is the probability that none of the three are supercommuters?
c. What is the probability that only the worker from Houston is a super-commuter?
d. What is the probability that exactly two of the workers are super-commuters?
Recall that for a rate λ Poisson process, the expected number of arrivals in [0, T ] is λT. Inspection of the code for poissonarrivals(lambda,T)will show that initially n = [1.1λT] arrivals are generated. If Sn > T , the program stops and returns ..
Diversi?cation works better when the investments in a portfolio have small correlations. To demonstrate this, suppose that returns on 500 Index Fund and Diversi?ed International Fund had the means and standard deviations we have given but were unc..
A machine fastens plastic screw-on caps onto containers of motor oil. If the machine applies more torque than the cap can withstand, the cap will break.
Write a model relating E(y) and x that would reflect the management's belief, and sketch the hypothesized shape of the model.
Suppose a point in two-dimensional Cartesian space, , is equally likely to fall anywhere on the semicircle. - Find the PDF of Y.
Suppose a product must go through a sequential assembly line made up of ?ve operations. The time it takes to complete each operation is normally distributed with a mean of 180 seconds and standard deviation of 5 seconds.
A vending machine that dispenses coffee into cups must fill the cups with 7.8oz of liquid. Before selling the vending machine to a college or business, the company tests the machine to be sure it is dispensing an average amount of 7.8oz of coffee.
Suppose that a random sample of 40 toddlers finds that 34 know what color Barney is. What is the 90% confidence interval for the percentage of toddlers who know what color Barney is?
If the person uses chains, what is the probability that he carries a shovel? Write a Solution Trail for this problem.- Given that the person does not use chains, what is the probability that she carries a shovel?
Use the attached data set for the following questions (laborEcon.dta) . Feel free to resample the data set if you think it is appropriate. Consider the earning function in the form of a linear regression equation we discussed before:
Choose a construct you would like to measure. Create an operational definition of your construct using at least three peer-reviewed journal articles as references.
john wants to compare two means. his sample statistics were picture and picture. assuming equal variances the 95
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