3. We know from experience that intensive coaching increases reading skill. Therefore if a class has been coached, or hypothesis is that it will gain in reading comprehension. At the end of the school year, a sample class of 25 which had received special coaching average 85 with standard deviation of which is 5 points higher on a reading test than the other classes in general in general which had received no coaching with level of significance of 5%

a, Create a Null Hypothesis and Alternative Hypothesis. (5pts)

b. Solve using T-test (10 pts)

c What is the critical value? (5 pts)

d Draw a conclusion. (5pts)