Average SHS annual cost of tuition fee for all private school last year was P46, 300. A random sample of costs this year for 45 private schools indicated that the sample mean was P47,800 and a sample SD was P5,600. at 0.10 level of significance, is there a sufficient evidence to conclude that the cost increase?

a. What appropriate test statistics is applicable on the given problem mention above? (One tailed or Two tailed? ; z test of t test?)

b. What is the null hypothesis?

c. What is the alternative hypothesis?

d. Critical value?

e. z computed

f. Decision Rule: (reject the null hypothesis OR failed to reject null hypothesis)