Problems: 1. Average Senior High School annual cost of tuition fee for all private schools in Cavite last year was Php 49.7\" a random sample of costs this year for '15 private schools indicated that the sample mean was Php 45: m and a sample standard deviation was Php L at the L01_ level at significance, is there sufcient evidence to conclude that the cost has increased? Step 1: State the hypotheses. Step 2: The level of significance, oneltwo-tailed test, degrees of freedom (if applicable) Step 3: Statistical Test Step 4: Computation