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Suppose a manufacturing company makes a certain item. The time to produce each item is normally distributed around a mean of 27 minutes with a standard deviation of 2.5 minutes. Thus, the population of production times is normal in shape. Find the mean and standard deviation of the sample.
Assume the condition of Normality is met for the problem below. I also want to know the following elements: (Please do not use the Student t test, nor a Chi-square test) Two-tailed test ok?
6 % have both defects. If you purchase one of the flashights in this shipment, find the probability that it has the following: defective bulb or a defective battery.
Find a eulerization of the graph that will allow the garbage truck to make a reasonably efficient Eulerian circuit through the neighborhood.
Let the following linear programming problem: Determine the optimal solution to this problem. Convert this problem standard LP form.
Twelve cases of leukemia are reported in people living in a particular census tract over a 5-year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer-incidence rates?
the spell-checker in a desktop publishing application may not catch all misspellings e.g. their there or correctly
Assume the probability of a tire blowout is 0.102% per 50,000 miles of use and that a person travels 13,000 miles per year in a car. Assume that the probability of loss of control is 30% if the blowout occurs on the front tires and 15% for the rea..
a medical study recorded the following information on 75 randomly chosen subjects. in the space provided describe the
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop. Check the normality assumption.
If the p value for a test for difference of educational level of two groups is p=0.0184, is the difference statistically significant at the 0.01 level?
An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find the 99% confidence interval for µ, the average annual salary ..
If it is assumed that the probability distribution for the number of room rentals forms a normal distribution, what is the probability that on a given night?
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