1. A researcher wishes to find out whether or not there is significance difference between the monthly allowances of morning and afternoon students in his school. By random sampling , he took a sample of 239 students in the morning session with a mean monthly allowance of P 142. He also took a sample of 209 students in the afternoon session with a mean monthly allowance of P 148 . They have a standard deviation of 4 in morning and 5 in afternoon Compute Z-test(two sample mean & two tailed) at .01 level.

2. A study was conducted to determine the effect of test wiseness on the achievements of high school students in mathematics. The two groups are experimental group and the other is control group. Both were given a test in Mathematics. The results are tabulated below: Group n X s Experimental 18 28.6 5.9 Control 14 21.7 4.6 * Does test wiseness significantly increase the achievements of students? Using .05 level. Compute T-Test (two sample mean, two tailed)

3. A study was conducted to determine the opinion of college students regarding the increase in tuition fees. The data show the result of the survey. Using the 0.05 level of significance, test if the four groups of students do not differ in their responses. Compute the Chi-Square Test. State the hypothesis.

Agree Disagree

Freshmen 32 65

Sophomore 36 70

Juniors 26 68

Seniors 20 80