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Suppose 60% of the people in town will get exposed to flu in the next month. If you are exposed and not inoculated then the probability of getting the flu is 80%, but if you are inoculated that probability drops to 15%. Of two executives at Beta company, one is inoculated and the other is not. What is the probability that atleast one will not get the flu? Assume that the events that determine whether or not they get the flu is independent.
The salaries of the employees of a corporation are normally distributed with a mean of $25,000 and a standard deviation of $5,000.
Of those customers using extra unleaded or premium gas, 60% fill their tanks. What is the probability that the next customer fills the tank?
A jewelry store orders five sets of earrings from this supplier. If the supplier selects the pairs of earrings at random, what is the chance that the jewelry store gets exactly two sets of platinum pairs?
State the main points of the Central Limit Theorem for a mean. B. Why is population shape of concern when estimating a mean? What does sample size have to do with it?
a population consists of 45 items 35 of which are defective. in a sample of 4 items what is the probability that
q1.simulate 100 random normal variables with mean 1.5 and standard deviation 2. create a histogram which shows the data
If Z = 1.96, s = 3, and E = 1, determine the correct sample size.
Students at a major university are complaining of a serious housing crunch
in the formula for the confidence interval for the mean if the confidence coefficient z?2 1.65 what is the confidence
A sample of 200 traffic accidents this year showed 74 persons were also involved in another accident within the last five years. Use the .01 significance level. Can we use z as the test statistic? Tell why or why not.
John earned a score of 89 on both exams. On which exam did John receive the higher letter grade? What was the minimum exam score required for a B in Statistics? What was the minimum exam score required for a B in Psychology?
If you assume returns follow a normal distribution, which investment would give a better chance of getting at least a $40 million return? Explain how your answer could change if you knew returns followed a skewed distribution instead of a normal d..
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