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Given a word problem or case study, and an accompanying data set which addresses a business situation such as daily demand or monthly sales, calculate numerical summaries including measures of central tendency such as mean and median and measures of variation including range and standard deviation.
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11.
Subjects at both sites were classified as dropouts if they left the study before the conclusion, or completers if they finished the study
A biologist has found that the average weight of 12 randomly selected adult mud turtles is 8.7 lb. with standard deviation 3.6 lbs. Construct a 99% confidence interval for the population mean weight of adult mud turtles.
Two teams of workers assemble automobile engines at a manufacturing plant. Quality control personnel inspect a random sample of the teams assemblies and judge each assembly to be acceptable or unacceptable.
From a population of cereal boxes marked "12 ounces," a sample of 81 boxes is selected and the contents of each box is weighed. You want to test whether the population mean is different from 12 ounces.
Entire batch will be rejected if at least one of those tested is defective. Determine the probability that entire batch will be rejected?
A researcher wished to estimate the number of households with two cars. How large a sample is needed in order to be 95% confident that the sample proportion will not differ from the true proportion by more than 4%.
They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
Describe a situation that might be viewed differently by two people. This event can be as minor as an encounter on the street or as major as the birth of a child.
Rob works in quality at a well known saw blade company. An inspector on his team has uncovered an issue with the kerf dimension on the bandsaw blade line. Rob conducts a sampling study and finds that 7% of the bandsaw blades are out of spec.
Write the linear regression equation to forecast father's education from mother's education?
An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula.
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