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Salaries for various positions can vary significantly depending on whether the company is in the public or private sector. The U.S. Department of labor posted the 2007 average salary for human resource managers employed by the federal government at $76,503. assume that annual salaries for this job type are normally distributed and have a standard deviation of $8850.
A. what is the probability that a randomly selected human resource manager received over $100,000 in 2007?
B. a sample of 20 labor relations managers is taken and annual salaries are reported. what is the probability that the sample mean annual salary falls between $70,000 and $80,000?
The radar traps at each of the locations L1 L2 L3 L4 are operated 40 30 20 and 30 of the time a person who is speeding on his way to Penn State has a probablities of 2 1 5 and 2 respectivley of passing through these locations what is the probablit..
How many ways can this happen if one person will win a new pencil, another will win a trip to McDonalds, another will win a weekend in Chicago, and the final prize is an automatic 4.0 in Math class.
The following data provided by a coffee company are the roast time in minutes for five batches of coffee (x) and the resulting shrinkage in percent of the coffee weight(y).
At the 5% level of significance, can we infer that branch A has a significantly higher proportion of satisfied customers than branch B?
What proportion of time is the machine down due to a type 1 failure? What proportion of time is the machine down due to a type 2 failure? What proportion of time is it up?
Conduct a hypothesis test for each sample at the 0.01 level of significance and determine what action, if any should be taken.
Analyze the data using multiple regression and what is the standard error of estimate? Can you use this statistic to assess the model's fit?
Which variable is the independent variable and which is the dependent variable? Write out the regression equation and sketch it on the plot. What percentage of the variability in the defect rate can be explained by differences in volume?
As part of a long-term study of individuals 65 years of age or older, sociologists and physicians at the Wentworth Medical Center in upstate New York conducted a study to investigate the relationship between geographic location and depression.
These plot yields followed approximately a normal distribution with mean 88 lb and SD 7 lb. Find the probability that any one randomly selected plot yield is greater than 90 lb.
Find the 98% confidence interval for the mean number of peaches per tree. How many trees does she need to sample to be accurate within 10 peaches per tree?
Use an appropriate test to determine if the reason for component failures is independent of their designs. Show your manual calculations here.
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