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WageWeb is a service of HRPDI and provides compensation information on more than 170 benchmark positions in human resources. The October 2003 posting indicated that labor relation managers earn a mean annual salary of $87,700. Assume that annual salaries are normally distributed and have a standard deviation of $9400. (Give your answers correct to four decimal places.)
(a) What is the probability that a randomly selected labor relation manager earned more than $105,200 in 2003?
(b) A sample of 29 labor relation managers is taken, and annual salaries are reported. What is the probability that the sample mean annual salary falls between $86,000 and $88,500?
a wildlife study has found that a wolf pack is successful in killing one large animal for every 12 that it chases.a
Compute a chi-square test for goodness of fit for each of the following, using the .05 level for each. In each problem, the expected distribution is equal frequencies in each category.
At the .10 significance level, can we conclude that there is a difference in the length of time the two types of treatment lasted?
Construct a 90 percent confidence interval for the proportion of all depositors who ask for cash back. (Round your answers to 4 decimal places.)
using an a 0.04 a confidence interval for a population proportion is determined to be 0.65 to 0.75. if the level of
Probability randomly selected person from US who is certain or has little doubt has no more than a H.S. education? probability randomly selected person from US will be a C.G. and be "certain" or "little doubt"?
Calculate the correlation between decorating and Christmas enjoyment - Maximize Wayne's studying effectiveness.
A standard deviation of five minuts. Assuming the call times are normally distributed, what percentage of calls are longer than 35 minutes.
Assuming the sigma of 200 was actually the standard deviation for the sample, recalculate the interval estimate. Discuss how this changed your result from that in part b.
you are collecting data asking participants about their religious background. choices include christian jewish muslim
Draw a tree diagram depicting the sample space outcomes for this experiment.
Jim Sears manufactures farm equipment. His work requires the use of steel bars which must have a mean length of at least 50 inches. The bars can be purchased from a supplier in Kansas
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