A study showed that the modern working

A recent study showed that the modern working person experiences anaverage of 2.1 hours per day of distractions (phone calls, e-mails,impromptu visits, etc.). A random sample of 50 workers for a largecorporation found that these workers were distracted an average of1.8 hours per day and the population standard deviation was 20minutes. Estimate the true mean population distraction time with98% confidence, and compare your answer to the results of thestudy.

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval

tayeserqp p201311