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The senior management of the electric power utility company let there be light (ltbl) has recently built at considerable expense a state of the art nuclear power plant in Gary Indian. The utility has applied or a start up permit from the environmental protection agency (EPA) which has expressed concern over the potential threat to the ecology of lake Michigan posed by the temperature of the waste water from the plant.
In particular, EPA scientists have established that a power plant's cooling system is working properly when the mean temperature of waste water is 58 degrees Fahrenheit or less. EPA staff believes waste water from LTBS's cooling system does not meet the specification that is they believe waste water from the LTBL cooling system is on average greater than 58 degrees Fahrenheit.
Conduct a hypothesis test. What is the p-value and how much evidence is there to conclude that the power plants cooling system is not working properly.
Does age make a difference in the amount of savings a worker feels is needed to be secure at retirement? Suppose 210 workers in the 25-33 age category and 176 workers in the 34-52 age category were involved in this study.
Find the 95% confidence interval for the mean, of the population from which the sample was drawn. (Round the values to whole numbers for your confidence interval.)
Suppose 91% of all Australian households having a fax machine have a personal computer. A Australian household is randomly selected. What is the probability that the household has a fax machine and a personal computer?
Mention the experimental outcomes. Illustrate out a random variable threat that represents the number of heads occurring on the two tosses.
Adult men have weights that are normally distributed with a mean of 172 lb and a standard deviation of 29 lb. Find the probability that the mean weight of the men in the sample is between 170 and 175 lb.
Questions based on binomial distribution, variance of the binomial distribution, discrete random variable and continuous random variables.
Suppose that a large corporation surveys all of their employees, and finds that 24% of them carry secondary health insurance. A representative from GoldStar Care visits 100 employees
If we are dealing with non-normal data we use Chebychev's Theorem. While not as precise, it does provide some level of utility. If we use Chebychev
The number of customers at a specialty meat store averages about 1500/day. The exact number varies from day to day. On Fridays before long weekends, the number of customers increases to about 3000. Which of the following statements is correct
Compare and contrast the characteristics of parametric and non-parametric test methodologies. Give examples of when to use each.
Determine the test value? Use α = 0.05. (Use the variances unequal formula).
What is the difference between expected value and mean? In other words, what would be difference between the expected value of something, as opposed to the mean of that something? And how do I know when I should be finding the expected value and n..
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