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For a random sample sample of size 12, one has calculated the 95% confidence interval for...

For a random sample sample of size 12, one has calculated the 95% confidence interval for μ and obtained the result (46.2, 56.9).
a) What is the margin of error for this confidence interval?
b) What is the point estimate for that sample?
c) Find the standard deviation (s) for that sample.
Math   Statistics-And-Probability   
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