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The correlation between the number of police on the street and the number of crimes committed, for a sample of 15 comparable sized cities, is 0.45. At the 0.05 significance level is there a positive association in the population between the two variables?
In what areas of your business is it important to draw inference? Describe a time when drawing an inference may have hurt your business.
What variables that affect blood pressure might confuse the comparison of average blood pressures for users and nonusers?
A population has a standard deviation of 16. If a sample of size 64 is selected from this population, what is the probability that the sample mean will be within 2 of the population mean?
Ten percent of the items produced by a machine are defective. Out of 15 items chosen at random. What is the probability that exactly 3 items will be defective?
suppose a production facility purchases a particular component part in large lots from a supplier. the production
The insurance company charges an annual rate of $250 for the collision coverage. What is the expected value of the collision policy holder?
Use the sample data to construct a 95% confidence interval estimate of the difference between the two rates of lost baggage. Does there appear to be a difference?
Let X be the number obtained on the blue die minus the number obtained on the red die. Draw a histogram for its probability function and a graph for its distribution function.
What does the coefficient of determination tell you about the variation in attendance and the variation in the number of exhibitors?
The overall average for the samples is 17 ounces. The range is only 0.5 ounce. Determine the upper and lower control-chart limits for averages for the boxes of cereal.
A poll found that 329 out of 763 adults said they would travel to outer space in their lifetime, given the chance. Estimate the true proportion of adults who would like to travel to outer space with 92% confidence.
If profit earned in the manufacture and sale of X units of a product is P dollars where: P = 10X - 0.001X2
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