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13. A medical researcher at Chilton Medical Center surveyed 12 hospitals throughout New Jersey and found...

13. A medical researcher at Chilton Medical Center surveyed 12 hospitals throughout New Jersey and found that the
standard deviation for the number of days a person stays at a hospital after having their appendix removed was
2.70 days. Assume the variable is normally distributed. Based on this, find the 95% confidence interval of the true
variance for the length of hospital stays.

Math   Statistics-And-Probability   
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