Question:

K A clinical trial was conducted to test the effectiveness

Last updated: 4/8/2024

K A clinical trial was conducted to test the effectiveness

K A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects After treatment with the drug 20 subjects had a mean wake time of 95 2 min and a standard deviation of 44 5 min Assume that the 20 sample values appear to be from a normally distributed population and construct a 95 confidence interval estimate of the standard deviation of the wake times for a population with the drug treatments Does the result indicate whether the treatment is effective Find the confidence interval estimate min min Round to two decimal places as needed