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The lifetimes of brakes manufactured by company A are random with density function g(x)=\begin{cases} \frac{1}{8}e^{-x/8} & x>0\\ 0 & x\le 0. \end{cases} The lifetimes of brakes manufactured by company B are random with density function h(y)=\begin{cases} \frac{1}{11}e^{-y/11} & y>0\\ 0 & y\le 0. \end{cases} A man installs brakes on his two cars simultaneously, one from company A and the other from company B. What is the probability that brakes from company B last longer than those from company A?
If you randomly assign participants to groups, can you suppose the groups are equivalent at the beginning of the study?
Use MegaStat's output for simple linear regression to determine the regression equation
if the endpoints of a confidence interval for the difference between a pair of treatment means are both positive
What is the probability that of today's 1,300 callers at least 5 received a busy signal? Use the poisson approximation to the binomial.
A researcher administers a treatment to a sample of participants selected from a population with µ = 80. If the researcher obtains a sample mean of M = 88, which combination of factors is most likely to result in rejecting the null hypothesis?
a student parks his car illegally on campus for a period of exactly one hour. parking enforcement personnel check the
test for single proportion.one kind of plant has only blue flowers and white flowers. according to a genetic model the
Determine the estimated mean of the following frequency distribution. A sample of the amounts paid for parking on Saturday at the Downtown Parking Garage in Toronto was organized into the following frequency distribution.
Testing for a linear correlation. Construct a scatter plot, find the value of the linear correlation coefficient r, and find the critical values of r from the table below using a=0.05.
the amount of distilled water dispensed by a certain machine is normally distributed with mean value 64oz and standard
A person purchased a slot machine and tested it by playing it 1,245 times. There are 10 different categories of outcomes, including no win, win jackpot, win with three balls, and so on.
Accounting procedures allow a business to evaluate their inventory at LIFO (Last In First Out) or FIFO (First In First Out). A manufacturer evaluated its finished goods inventory (in $ thousands) for five products both ways.
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