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# Use the given degree of confidence and sample data to find a

### Customer Question

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
\$539 < σ < \$1734
\$559 < σ < \$1953
\$697 < σ < \$1156
\$598 < σ < \$1697
Submitted: 1 year ago.
Category: Calculus and Above
Expert:  Ryan replied 1 year ago.

Hi,

Thank you for using the site. I'll be happy to help you with this problem. I'll have the solution posted for you in just a minute or two.

Ryan

Expert:  Ryan replied 1 year ago.

Hi again,

The solution is C) \$559 < σ < \$1953