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The annual rainfall in a certain area is normally distributed with a mean of 25 inches and a standard deviation of 5 inches. What is the probability that the area receives at least 30 inches of rain in a year?
Revenue, The marketing research department for a company that manufactures and sells "notebook" computers established the following price-demand and revenue functions.
A random sample of 15 observations from the first population revealed a sample mean of 350 and a sample standard deviation of 12.
Use regression analysis to develop an estimated regression equation that could be used to predict the value score given the price of the car.
A statistics professor plans classes so carefully that the lenths of her class are uniformly distributed between 50.0 and 52.0 minutes. Find the probability that a given class period runs less than 51.5.
Car Emissions: Listed below are measured amounts of greenhouse gas emissions from cars in three different categories. The measurements are in tons per year, expressed as CO2 equivalents.
In a group of six professors selected at random, what is the expected number of extroverts? What is the standard deviation of the distribution?
The supplier agrees they will deliver on the day the order is placed. Note that the basic unit of measurement for a period is one year in this case.
What nonparameiric test can be used to distinguish total heart weight of males with left-heart disease with that of normal males? Write and Implement test and report a p-value.
Whirltag claims that the useful lifetime of its dishwashers is normally distributed with a mean of 3 years and a standard deviation 1 year.
Developing a linear programming problem using Commuter Bus scheduling to minimize the total cost.
Scores on a scholastic aptitude test are normally distributed with standard deviation σ=100 points. A group of 25 inner city high school students takes the test; their mean scores is x-bar = 440 points.
A shipment of crankshafts is believed to be defective. A simple random sample of 16 is drawn from a large shipment. Check to see if the sample is any different from the assumed population mean of 224.
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