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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).
Suppose you have the experiment of flipping a coin three times.
Examine the plot of the regression residuals against t. Is there a tendency for the residuals to have long positive and negative runs? To what do you attribute this phenomenon?
Be sure the appropriate assumptions and conditions are satisfied before you proceed.
One use of the Chi-square goodness of fit test is to determine if specified multinominal probabilities in the null hypothesis is correct.
question six hundred consumers were asked whether they would like to purchase a domestic or a foreign automobile. their
Given the following situation, how would you use Megastat to test whether the population defective rate is greater than 5%? Please outline the process for the test and, if necessary, including the output from Megastat to explain your approach.
3 section of a statistics class containing 28,32 and 35 students averaged 83,80 and 76 respectively on same final exam. what 's the combined population means of all the 3 sections ?
What is the probability that a sample of 16 persons would weigh more than 1140 kilos and what is the probability that exactly 20 germinate?
Brake Pads- A brake pad manufacturer claims its brake pads will last for 38,000 miles. You work for a consumer protection agency and you are testing this manufacturer's brake pads.
the probability distribution of a discrete random variable x is given bypx -1 15 px 0 25 px 1 25 .a. compute
suppose x and y are independent. let x have the mean 3 and y have the mean 2. find the covariance of xy and
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
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