"the average cost of tuition plus room and board for a small private liberal arts college is reported to be $9200 per term.but a financial administrator believes that the average cost is higher .A study conducted using 350 small liberal arts colleges showed that the average cost per term is $9515.The population deviation is $1200.Let a= 0.05.Based on the computed test statistic or p-value,what is our decission about the average cost?"