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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).
Develop the estimated regression equation that can be used to predict the closing price given the value of Period At the .05 level of significance, test for any positive autocorrelation in the date.
a new computer virus attacks a folder consisting of 200 files. each file gets damaged with probability 0.2
a random sample of 120 financial analyst was polled on the issue of company valuation. ninety-six favored inclusion of
The midpoint for each class (enter in table above): Calculate the estimated arithmetic mean of the sample Calculate the estimated arithmetic median of the sample
What is the smallest level of significance at which you could reject the null in favor of the alternative hypothesis?
a local unemployment office keeps track of the number of new claims filed each day. based on data collected it
Compute the mean number and median number of apples in a bag.
Formulate an appropriate statistical model, defi ning all the terms. State the null and two-sided alternative hypotheses which reflect the research question of interest.
the waiting times between a subway departure schedule and the arrival of a passenger are uniformly distrubted btween 0
What is the standard deviation of the number of service calls and compute the coefficient of variation of the number of service calls.
suppose we have a sample of 245 patients who have undergone gastric bypass surgery. their average weight loss 6 months
suppose a study estimated the population mean for a variable of interest using a 99 confidence interval. if the width
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