Question

A dinical trial was conducted to tesl the efectiveness of a dng used for treating insomnia in alder subjects Aer teatment with the drug, 30 subjects had a mean wake time of 92 5mn and a standad deviation of 41 5 min Assume hat the 30 sample values appear to be from a normaly distributed population and construct a 90 % conidence interval estimate of the standsard deviation of the wake times for a population with the drug treaments Does the result indicate whether the treatment is effective? Find the confidence interval estimate mina min (Round to two decimal places as needed) Does the result indicate whether the treatment is effective? OA Ye the oontdence interval indicates that the treament is not effective because the interval does not contain 92 5minutes OB Yes, the contidence interval indicates that the treatment is efective because the interval does not contain 925minutes Oc Yes, the contence interval indicates that the treament is not effective because the nterval contains 0 mintes OD. Yes, the oonfdence interval indicates that the treatment is effective because the interval does not contain 0 minutes OE No the condidence interval does not indicate whether the treatment is effective OF Yes the confidence interval indcates that the treatment is not effective because the interval does not contain 0 minutes OG Yes, the oonfidence interval indicates that the treatment is effective because the interval contains 0 minutes

Answer 1

ACie treat want s Mean 2.5 Standard deviah'a s) HI.5 lample ligt n - 30 alcolate dereesof fvee dom lhe n-1 30-1 21 with 29 dere tu crihcal value ot oy of rce dom 901. - tS) 92.5 . 75) 41.52 12.5 12 394 1.626, 10s. 394) 71. 626 10S.344 9.43 <I05. 32