1.Two groups of students are tested after two types of instruction.Student Group 1 receives traditional instruction and Student Group 2 receives modified instruction. Below are the t-test results:

t-Test: Two-Sample Assuming Equal Variances Students 1 Students 2 Mean 15.3 16.9 Variance 4.9 2.766666667 Observations 10 10 Pooled Variance 3.833333333 Hypothesized Mean Difference 0 df 18 t Stat -2.82732877 P(T