1. Average Senior High School annual cost of tuition fee for all private schools in Cavite last year was 46,300 Php a random sample of costs this year for 45 private schools indicated that the sample mean was 47,800 and a sample standard deviation was 5600 at the 0.10 level of significance, is there sufficient evidence to conclude that the cost has increased?

Step 1: State the hypotheses.

Step 2: The level of significance, critical region, and df if any.

Step 3: Compute for the value of one sample z test

Step 4: Decision rule Step 5: Conclusion