Question: Estimating Variation Data Set 14 in Appendix B includes the Flesch-Kincaid Grade Level ratings for 12 pages randomly selected from J. K. Rowlingss Harry Potter

Estimating Variation Data Set 14 in Appendix B includes the Flesch-Kincaid Grade Level ratings for 12 pages randomly selected from J. K. Rowlings’s Harry Potter and the Sorcerer’s Stone, and those 12 ratings have a standard deviation of 1.17, and they appear to come from a normally distributed population. Construct a 95% confidence interval estimate of the standard deviation s for the Flesch-Kincaid Grade Level ratings for all pages from Harry Potter and the Sorcerer’s Stone.

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