G4

Two professors at a local college developed a new teaching curriculum designed to increase students' grades in math classes. In a typical developmental math course, 55% of the students complete the course with a letter grade of A, B, or C. In the experimental course, of the 14 students enrolled, 10 completed the course with a letter grade of A, B, or C. Is the experimental course effective at the a = 0.1 level of significance? Complete parts (a) through (9) P-value = (Round to three decimal places as needed.) Is there sufficient evidence to support the research that the experimental course is effective? O A. No, do not reject the null hypothesis because the P-value is less than o. There is insufficient evidence to conclude that the experimental course is effective O B. Yes, reject the null hypothesis because the P-value is greater than a. There is sufficient evidence to conclude that the experimental course is effective O C. No, do not reject the null hypothesis because the P-value is greater than a. There is insufficient evidence to conclude that the experimental course is effective O D. Yes, reject the null hypothesis because the P-value is less than a. There is sufficient evidence to conclude that the experimental course is effective (g) Explain the role that sample size plays in the ability to reject statements in the null hypothesis When there are small sample sizes, the evidence against the statement in the null hypothesis must be One should be wary of studies that the null hypothesis when the test was conducted with a small sample size