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The National Safety Council estimates that off-the-job accidents cost U.S. businesses almost $200 billion annually in lost productivity (National Safety Council, March 2006.) Based on NSC estimates, companies with at least 50 employees are expected to average three employee off-the-job accidents per year. What is the probability of at least two off-the-job accidents during a one-year period?
Assume that test scores from a college admissions test are normally distributed, with a mean of 450 and a standard deviation of 100. Suppose someone receives a score of 630. What percentage of the people taking the test score better?
Consider a system with transfer function (s) = (s -2)/(s+ I). What are the steady-state responses excited by u(t) = 3, for t = 0, and by u(t) = sin 2t, for r =
25 of the flights arriving at the san diego airport during the first five months of 2001 were late. assume the
Test the claim that the average SAT score for graduating high school students is equal to 1100. A random sample of 70 students was selected, and the average SAT score was 1035. Assume σ " 310 and use α= 0.10. What is the p-value for this sample?
Determine the cost Xs to develop the support system for which the probability of exceeding Xs is equal to 0.01?
Is this an observational or an experimental study?- Describe the sample in this problem.- Is this a random sample? Justify your answer.
question for the population of all u.s college students the gpa is approximately normally distributed with a mean of
valerie bertinelli and subway jared compete in a series of six wing eating contests. the voracious valerie consumes an
The scatterplot shows the number of hours of work per week and the number of hours of sleep per night for some college students.
You have eight machines operating independently. The mean production rate for each machine is 20.3 tons/day, and the standard deviation is 1.4 tons/day.
the amount of coffee dispensed in a paper cup of a vending machine is normally distributed with a mean of 4.5 oz. and
In a laboratory experiment, data were gathered on the life span (Y in months) of 33 rats, units of daily protein intake (X1), and whether or not agent X2 (a proposed life extending agent) was added to the rats diet (X2 = 0 if agent X2 was not added, ..
Research has shown that losing even one night's sleep can have a significant effect on performance of complex tasks such as problem solving ( Linde & Bergstroem, 1992).
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