An economics professor is taping 60-minute lectures for replay over the university radio station.To make sure that the brand of tapes that will be used records for at least sixty minutes,one dozen are purchased and examined to determine if they do record for sixty minutes.The results of the recording test in minutes show a mean of 61.28 and standard deviation of 3.868.The professor assumes that the playing time is normally distributed.Construct an 80-percent confidence interval for the mean recording time employing these data.
____________________ to ____________________
Correct Answer:
Verified
Q125: The office manager for an ophthalmologist wants
Q126: A rechargeable flashlight is advertised to last
Q127: Compute a 95 percent confidence interval
Q128: A manufacturer of salad dressings uses machines
Q129: A mother who is interested in the
Q131: From a community of 80 homes,the EPA
Q132: A survey based on a random sample
Q133: In a survey of 600 senior business
Q134: A survey of 9512 residents of the
Q135: Thirty-eight percent of a sample of 100
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents