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The hourly wages in a particular industry are normally distributed with mean $13.20 and standard deviation $2.50. A company in this industry employs 40 workers, paying them an average of $12.20 per hour. Can this company be accused of paying substandard wages? Use alpha = 0.01 level test. Calculate the p-value. Does it suggest the same as your HT?
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The average hourly wage last year for members of the hospital clerical staff in a large city was $6.32. The standard deviation of the population was $.54. This year a sample of 50 workers had an average hourly wage of $6.51. Test the claim at alph..
undergrad students in a section of stat 225 are classified as lower classmen freshman and sophomores and upper classmen
inverse probability based on normal distribution.the mean price of new homes from a sample of houses is 155000 with a
1) Twenty-five factory workers were asked how many vacation days they take a year. The average of the sample was 22.85 days, and the standard deviation was 5.80 days. In the past HR uses an average of 25 vacation days per worker in order to ..
Data on the number of occurrences per time period and observed frequencies follow. Use a=.05 and the goodness of fit test to see whether the data fit a Poisson distribution.
The coffee/soup machine at the local bus station is supposed to fill cups with 6 ounces of soup. Ten cups of soup are brought with results of a mean of 5.93 ounces and a standard deviation of 0.13 ounces. Construct a 99% confidence interval for th..
a psychologist wants to determine if there is a linear relationship between the number of hours a person goes without
According to an Internet posting, 80% of adults enjoy drinking beer. If a group of 3 adults is selected at random, find the probability that none of them enjoy drinking beer.
Use a .10 level of significance to test the claim that the variance of all scores in the population is more than 9.
basic sensitivity analysisnbspmurdock paints is in the process of evaluating two mutually exclusive additions to its
Sample mean is 50, t-statistic is 1.96, and standard error of sample mean is 2. Determine the 95 percent confidence interval?
estimate your own moment of inertia about a vertical axis through the center of the top of your head when you are
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