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Suppose that f (x) = e-(x-7.4) for 7.4 < x and f (x) = 0 for x ? 7.4. Determine the following probabilities. Round your answers to three decimal places (e.g. 98.765).(a) P (X > 7.4)(b) P (7.4 ? X < 8.8)(c) P (X < 8.8)(d) P (X > 8.8)(e) Determine x such that P(X < x) = 0.959.
to perform a certain type of blood analysis lab technicians must perform two procedures. the first procedure requires
an electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with
The sampling distribution of the average score and Suppose x' is your average pay for the 100 weeks. Then x' has approximately
why is the coefficient of correlation an important tool for statisticians? provide some specific examples from real
ABC Corporation of California publishes a variety of statistics, including the number of individuals who got a new job during the past 12 months and the mean length of time the individuals have been on the job.
Is there a linear relationship between age and education, and if so, how strong is that relationship? Is it possible to predict educational level based on age? If so, what limitations exist for the developed method?
scores on a standard test are normally distributed with a mean of 104 and a standard deviation of 15. an individuals
A doctorhas developed an experimental drug for toe-nail fungus. He needs to test it out on some people to make sure it works. He has a list of 2000 people who could be potential subjects in his study. 1120 of these potential subjects have toe ..
Suppose that the number of accidents occurring in an industrial plant is described by a Poisson distribution with an average of one accident per month. Let x denote the time (in months) between successive accidents.a Find the probability that the ..
How large a sample must be selected if the company wants to be 85% confident that the true mean differs from the sample mean by no more than 1 day?
A sample of approx 25 students enrolled in the university points out that X (bar) = $315.4 and s = $43.20.
If the standard deviation of the amount spent on books is $8.42, find these probabilities for a randomly selected American. Put answer in percent form.
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