Aciinical trial was concluded to test the effectiveness ofa drug used for treating insomnia in older subjects. After treatment with the drug, 2? subjects had a mean wake time of 94.7 min and a standard deviation of 41.4 min. Assume that the 2? sample values appear to be from a normally distributed population and constnrct a 98% condence interval estimate of the standard deviation of the wake times for a population with the dmg treatments. Does the result indicate whether the treatment is eective? Find the condence interval estimate. |:|ITIII'I=:D'<: to two decimal places as needed. does the result indicate whether treatment is effective a. yes condence interval indicates that because not contain minutes. b. confidence contains i c. d. e. no effective. c f. g. minutes>