27. School Workers In addition to teachers and administrative staff, schools also have many other employees, including bus drivers, custodians, and cafeteria workers In Auburn, WA, the average hourly wage is $24.98 for grounds persons, $21.80 for custodians, and $17.66 for assistant cooks.6 Suppose that a second school district employs n536 grounds persons who earn an average of $21.51 per hour with a standard deviation of s5$2.84. Find a 95% confidence interval for the average hourly wage of grounds persons in school districts similar to this one. Does your confidence interval enclose the Auburn, WA average of $24.98? What can you conclude about the hourly wages for grounds persons in this second school district?