Dr. Pearson is testing the effect of texting in class on exam scores. He randomly assigns students to two different groups: one group texts during a lecture and the other group does not text during a lecture. After the lectures, he gives both classes an exam on the material. Group A (the texting group): M = 80, n = 50, and SS = 1500; Group B (the non-texting group): M = 78, n = 45, and SS = 1450. Conduct an independent samples t test with = .01. State the null hypothesis (symbols or words). State the alternative hypothesis (symbols or words). Determine the critical value(s). Compute the test statistic. Draw conclusion regarding the null hypothesis. Interpret the conclusion in terms of the research