SOLUTION: Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ. Assume that the population has a normal distribution.

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Question 869530: Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ. Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation.
College students' annual earnings: 98% confidence; n = 9, = $3959, s = $886
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

ME = 2.33(886/3) = $688.13  (nearest hundred)

CI: μ-ME < u <  μ + ME

CI: $3959-$688 < u <  $3959-$688

Round the confidence interval limits to the same number of decimal places as the sample standard deviation