The Boston public school district has had difficulty maintaining on$-$time bus service for its students $("$A Year Later, Boston Globe, October $5).$ Suppose the district develops a new bus schedule to help combat chronic lateness on Historically, the bus service on the route has been, on average, $11$ minutes late. After the schedule adjustment, the an average of eight minutes late. As a result, the Boston public school district claimed that the schedule adjustme students were not as late. Assume the population standard deviation for bus arrival time was $11$ minutes. The valu

Multiple Choice

$z=-0\mathrm{.}33$

$t_{35}=-0\mathrm{.}33$