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A manufacturer of "low precision" 10 mm diameter ball bearings periodically takes samples and measures them to con?rm that the manu- facturing process is still on target. A random sample of 20 ball bearings resulted in diameter measurements with an average of x¯ = 9.86 mm, and a standard deviation s = 1.01 mm. Postulating that the random sample X1 , X2 ,..., X20 is from a Gaussian distribution with μ = 10, ?nd the probability that any sample mean, X¯ , will fall to either side of the postulated mean by the observed amount or more, by chance alone. i.e. P (X¯ ≤ 9.86) or P (X¯ ≥ 10.14).
which of the following could not be the value of a correlation
a. Use PERT to identify the expected time and variance for each activity. b. What is the critical path? c. What is the expected time and variance of the critical path?
What is meant by a distributed lag model and write the equation for a general distributed lag model with an infinite number of lags and for one with k lags.
a new simple test has been developed to detect a particular type of cancer. each of the 2000 adults and finds by other
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
A comparison between products manufactured in China VS Mexico and their perceived quality to the US consumer based on manufacturing location.
Graph this equation put at last five points for the equation. Graph each inequality. use the test point method.
Utilizing the chart parameters developed above to define the control charts for future candy bar production, Compute the appropriate plotting points from the data.
Consider a simple random sample of n=116 people. Denote by X the number of people in the sample that have the disease. Calculate the following probabilites. P(X=23)=?
For the period from 1918 to the present, in a random sample of 9 wolves spotted in the region, what is the probability that 6 or more were male.
you are given the following information obtained from a sample of 5 observations taken from a population that has a
Suppose we play a game where we start with c dollars. On each play of the game you either double or halve your money, with equal probability. What is your expected fortune after n trials?
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