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An averaged department store sells 350 mens suits per year. The mens suit departments at a particular national chain of stores claim they sell more than the industry average. In 35 of their stores they sold on the average 430 suits per year with a population standard deviation of 40. What is the test value for their claim?a) 0.34
b) 2.00
c) 6.92
d) 11.83
What are the differences between regression and correlation analysis? What is correlation? Does correlation prove causation? Why or why not? Explain and provide examples to support your explanation.
Define the rejection region. State the statistical decision.
As sample size increases, the standard error of M _______________ .
Determine the probability that person selected has blood type O? Given that person selected is a male, determine the probability that their blood type is AB?
Then explain your answer to someone who has never had course in statistics (but who is familiar with mean, standard deviation, and Z scores.)
Assuming the population is large, which sample size will give the smallest standard deviation to the statistic and select the numbers for the first five to be interviewed.
What percentage of bottles can we expect to have a volume less than 32 oz?
Also, the sample data appear to have a bell-shaped distribution. Construct the 95% confidence interval for the mean time spent on paperwork by all managers.
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With more then a million teachers set to retire we are seeing a record number of turnovers in the teaching profession.
A college would like to have an entering class of 1200 students. Because not all students who are offered admission accept, the college admits more than 1200 students.
A marketing survey is conducting in which students are to taste two different brands of soft drink. Their task is to currently identify the brand tasted.
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