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The distribution of the amount of money in savings accounts for University of Miami students has an average of 1,100 dollars and a standard deviation of 1000 dollars. Suppose that we take a random sample of 10 University of Miami students and ask them how much they have in their savings account. The sampling distribution of the sample mean amount of money in a savings account is
A. approximately Normal, with a mean of 1100 and a standard error of 316.23
B. not approximately normal
C. approximately Normal, with a mean of 1100 and a standard error of 1000
D. Approximately Normal with an unknown mean and standard error
a mineral economist estimated that a particular mining venture had probability 0.4 of a 30 million loss probability 0.5
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Percentage points in either direction from what would have been obtained by interviewing all voters in the United States." Find the sample size suggested by this statement.
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A standard deviation of 7.3 years. What is the 95% confidence interval estimate for the average number of years served by all Supreme Court justices?
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