Question

In Summer 2018, Diego(Buti Dhrop)and Tai(No MEME’s);known for theirDhropp It Like It’s Not! Stats Report,conducted a survey on whether dollar coins or quarters would be left on a busy sidewalk the longest. Theyrecorded the amount of time each coin was left on the sidewalk before being picked up. According to their results the dollar coins remained a mean time of 390 seconds while the mean length of time that the quarters stayed on the sidewalk was 5.75 minutes. Assume that these means are based on samples of fifty 1-dollar coins and forty-five quarters and that the two-samplestandard deviations are 105 seconds and 72 seconds,respectively. Find a 99% confidence interval for the difference between the corresponding means. (Hint: Use minutes not seconds.) (8pts)

Answer 1