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The yield, in tons of ore per day, at a given coal mine is approximately normally distributed with mean 785 tons and standard deviation 60.
Find the probability that at least 800 tons of ore will be mined on a given day. Find the proportion of working days in which anywhere from 750 to 850 tons is mined. Find the probability that on a given day, the yield will be below 665 tons.
suppose that the percentage annual return you obtain when you invest a dollar in gold or the stock market is dependent
Clearly identify the independent and dependent variables you would study. Determine whether a one-tail or two-tail test is most appropriate and explain why. Generate a testable null statistical hypothesis and an alternative statistical hypothesis.
there are 40 students in an elementary statistics class. on the basis of years of experience the instructor knows that
In the following regression output using data on 40 ferns In Ine textile Industry, the variable PROFIT is measured in millions of dollars per year. ADV Is expenditure on advertising per year in millions. and RD Is expenditure on research ar4 develo..
The researchers found that subjects who answered immediately made the best decisions and that "the longer our participants thought about their answers, the more likely they were to include irrelevant information at the expense of relevant informat..
Past experience shows that the standard deviation of the yearly income of textile workers in a certain state is $400. How many textile workers would you need to sample if you wished to estimate the population mean to within $50.00, with probabilit..
Assuming normal populations with equal standard deviations, and using the 0.10 level, is there a significant difference between the two routes? Construct and interpret the 90% confidence interval for the difference between the population means.
A doctor gives a patient a8080?%chance of surviving bypass surgery after a heart attack. If the patient survives the? surgery, then the patient has a2525?%chance that the heart damage will heal. Find the probability that the patient survives the s..
in independent random sample of male athletes and male nonathletes at a large university we find the following samplae
Determine the centerline and the upper and lower control limits for a 3-sigma mean control chart in which each sample consists of 4 cylinders
Assume we interested in relationship between the age of individual, as measured by visits. Suppose after selecting 15 members the observation:
This Case Study problem is basically a prediction problem and we have to use Supervised Learning Algorithms of Machine Learning . Here we are given some input data with some multiple inputs and a output and we have to predict the output. It is basica..
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