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The mean amount of life insurance per household in the United States is $110,000. This distribution follows the normal distribution with a standard deviation of $40,000.
a) What is the likelihood of selecting a sample with a mean of at least $112,000?b) Find the likelihood of selecting a sample with a mean of more than $100,000 but less than $112,000.
Provide an overview of the problem you identified. What are some research components that could be measured in order to address the research question or hypothesis you identified? How might a researcher obtain that information?
Consider a worker-paced line with three process steps, each of which is staffed with one worker. The sequence of the three steps does not matter for the completion of the product.
Will an SRS of size 1785 usually give a result p-hat within plus or minus 3 percentage points of the true population proportion? Explain.
A recent study of 75 workers found that 53 people rode the bus to work each day. Find the 95 percent confidence interval of the proportion of all workers who rode the bus to work.
How many of these new cardholders would you expect to default? What is the standard deviation?
I have fit a line to data representing cholesterol readings for 28 individuals starting a cholesterol reducing drug. The computer provides the following output, The degrees of freedom for the t test for the slope are
A real estate builder wishes to determine how house size (house) is influenced by family income (income), family size (Size) and education of the head of household (School).
A sample of charge accounts at a local drug store revealed the following frequency distribution of unpaid balances. Determine the standard deviation. Compute the coefficient of variation.
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Generate a 95% confidence interval for the true mean total cholesterol levels in children.
Use a two proportion z-test to perform the required hypothesis test. State the conclusion.
Suppose that four families are surveyed and that each one reports whether its income exceeded the reported medium for that year. List the sample points.
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