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What is the probability that between 790 and 810 of these intervals contain the corresponding value of μ? [Hint: Let Y = the number among the 1000 intervals that contain μ. What kind of random variable is Y?] (Round your answer to four decimal places.)
a light fixture contains 2 light bulbs. the lifetime xi of each bulb is exponentially distributed with a mean of 200
the diameter of an electric cable is normally distributed with a mean of 0.8 inch and a standard deviation of 0.03
Post a message in the Discussion area that answers the following question. Do you think the person has ESP or can their success ratio be attributed to chance variation?
The mayor of a small town would like to know whether a local bond issue is likely to pass or not. He mails a survey to 500 randomly selected voters.
in a certain rural area of new york state 80 of drivers use chains on the car tires for winter driving. 60 of drivers
A sample of PVC pipes coming off a production line were tested for pipe diameter size. The statistical results (in millimeters) were:
A random sample of size 15 taken from a normally distributed population revealed a sample mean of 75 and a sample variance of 25. The upper limit of a 95% confidence interval for the population mean would equal?
1. what is sampling? briefly explain the various methods of sampling.2. a company appoints four salesmen a b c and d
Wheel-Rite has agreed to ship the maximum number of wheel bearings that it produces each day to Itex when an order has been received.
statistics released by the national highway traffic safety administration and the national safety council show that on
at a local manufacturing plant employees must compolete new machine set ups within 30 minutes. new machine set up
Suppose the probability that a carton of eggs will contain at least one broken egg is 1/3. use a simulation of 20 trials to find the probability that the next three cartons will contain only unbroken eggs.
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