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A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25 years ("Appliance life expectancy," 2013). The life of a dishwasher is normally distributed. Suppose you are a manufacturer and you take a sample of 10 dishwashers that you made.
a.) State the random variable.
b.) Find the mean of the sample mean.
c.) Find the standard deviation of the sample mean.
d.) What is the shape of the sampling distribution of the sample mean? Why?
e.) Find the probability that the sample mean of the dishwashers is less than 6 years.
f.) If you found the sample mean life of the 10 dishwashers to be less than 6 years, would you think that you have a problem with the manufacturing process? Why or why not?
What is the difference between fluid intelligence and crystallized intelligence? Please give an example for each.
Draw a scatter diagram representing these data.- Using the "eyeball" method, fit a straight line to the data.- Does there appear to be any relationship between the variables? If so, is the relationship direct or inverse?
Customers arrive at the rate of four per minute at a large bank branch in downtown Seattle. In its advertis ing, the bank stresses that customers will receive ser vice promptly with little or no waiting.
So, looking at the examples in your Lesson 12, please solve the following problems:1. 2.
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The accompanying table summarizes randomly selected sample data for San Francisco Defendants in burglary cases.
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Let T be a location invariant estimator of µ in a one-parameter location problem. Show that T is an MRIE under the squared error loss
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