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Consider a sample of 30 WMU engineering alumni. The population average salary is $55,000 and amongst the 30 alumni the sample standard deviation is $12,000. Assuming the population is normally distributed answer the following:
A. What is the probability that the average salary of the sample is greater than $60,000?
B. What is the probability that the average salary of the sample is between $50,000 and $54,000?
C. What is the probability that the average salary of the sample is less than $48,000?
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at a temperature of 25 degrees c the resistances of a type of thermistor are normally distributed with a mean of 10000
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The mean and median selling price of existing single-family homes sold in October 2005 were $216,200 and $265,000. Which of the following most accurately explains which is the mean and which is the median and why?
What does confidence interval tell you? What does it mean? What 2 things can a researcher do to decrease width of a confidence interval? What are the effects?
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The length of the thorax (where the wings and legs attach) in a population of male fruit flies is approximately Normal with a mean 0.800 (mm) and standard deviation 0.078 mm. What proportion of flies have thorax length 0.9 mm or longer?
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In how many different ways can 5 songs be arranged if a particular song must be the first on the EP?
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