Use the given confidence level and sample data to find a confidence interval for the population standard deviation σ. Assume that a simple random sample has been selected from a population that has a normal distribution. Salaries of college graduates who took statistics as a course in college 98​% ​confidence; n=81​, x=​$55,500​, s=​$19,346 LOADING... Click the icon to view the table of​ Chi-Square critical values.

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A: From the given information, Sample data = {1, 2, 3, 4} a) All quartiles are calculated as: