An educator has developed a program to improve math scores on the Texas STAR test. The average STAR Mathematics test for third graders in the district was u = 1472. A sample of n = 30 third graders took the new math training program before taking the STAR Math test. The average score for the students was M = 1497 with a standard deviation of s = 145 (note, this is standard deviation, not variance). Was there a significant change in test scores? (Use a = 0.05, two-tail test) Determine the degrees of freedom (df). Determine the tort value. Calculate the estimated standard error (Sm) of scores for the sample. Calculate the observed t statistic for the sample. Calculate the effect size using Cohen's d. What conclusion can be made from these data?