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Suppose that two electronic components in the guidance system for a missile operate independently and that each has a length of life governed by the exponential distribution with mean 2 (with measurements in hundreds of hours).'
a) Use the Distribution Function method to find the c.d.f. and p.d.f. for Y_bar = (Y1+Y2)/2, the Average of the two lifetimes.
b) Find the mean and variance of this average, using the answer in part (a).
Now we would like to evaluate regression equation for X using Y as independent variable.
If there are 81 fraternity members, how much should they buy so that using the normal approximation they are 93.32% sure they will not run out?
in a poll of 600 randomly selected subjects 240 answered yes when asked if they planned to vote in a state election.
in a large population 95 of the households have cable tv. a simple random sample of 64 households is to be contacted
drcatscan is an ophthalmologist who in addition to prescribing glasses and contact lenses performs laser surgery to
If you estimate a regression using OLS, but you do not include an intercept, do you know if the mean of the residuals is zero? Explain.
Testing for Population mean - Based on this sample evidence, is Joan's supervisor correct? Use a = .05.
1. the following data show samples of three chain stores in three different locations in one town and the amount of
the probability that an individual egg in a carton of eggs is cracked is 0.03. you have picked out a carton of 1 dozen
Determine the probability that pregnancy will (a) last more than 300 days; (b) less than 240 days; (c) between 250 and 282 days.
in the game of ludo a player has to throw one die and move a selected token based on the number shown on the die. if a
if a confidence interval for the difference between a pair of treatment means includes 0 then we fail to reject the
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