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Normal Probability distributions:
The reported scores on a nationally standardized achievement test for high school graduates have a mean of 500 with the standard deviation of 100. The scores of are approximately normally distributed, what is the probability that the score of a randomly chosen individual will be (a) between 500 and 650? And (b) between 450 and 600?
Customer purchase package 2, 20% of their customers purchase package 3 and 25% of their customers purchase package 4. Find the expected value or average profit per customer.
Verify that the "Conditions for Probabilities for Discrete Random Variables" given on page 267 are met.- Draw a picture of the probability distribution function.
Is there evidence to suggest that the training course helps out sales people?
The probability that during a sample of four (4) fishing days, the weight of the daily catch will be between 109 tons and 151 tons is?
Although these errors are often well concealed, let's suppose that a thorough IRS audit will uncover them. If a random 250 tax returns are audited.
A transportation company wants to estimate the average length of time goods are in transit across the country. A random sample of 20 shipments gives = 2.6 days.
the amounts of soft drink machine is designed to dispense for each drink are normally distributed with a mean of 11.7
For example, a school department may have to make a decision regarding a new textbook adoption. The issue in adopting the textbook is that it affects what curriculum will be taught in the classroom. It impacts how the curriculum will align with na..
suppose 13 of american adults believe that the highest priority of america is to protect freedom of speech. we will
A week later the analysis had been completed. Of a total of 144 accounts (including the nine reported in part b), the average was x- = $11,254. Find the posterior distribution for μ for each of the two prior distributions. Calculate P(Μ > $11,000) f..
What is the height of a woman with a z-score of -1?What is the z-score for a woman who is 70 inches tall (5 feet 10 inches)?
assume that a quality characteristic is normally distributed. an x-bar control chart is constructed with 3 sigma
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