ANSWERS MUST BE FOUND USING R SOFTWARE! COMPUTATIONS BY HAND WILL RECEIVE NO CREDIT. PLEASE INCLUDE ALL CODE USED IN R.
1 Verizon 2:01 PM Expert Q&A Done Solve the following problem using R software. Please include all necessary code. The article "Computer-Assisted Instruction Augmented with Planned Teacher/Student Contacts (J. of Exp. Educ Winter, 1980-1981: 120-126) compared five different methods for teaching descriptive statistics. The five methods were traditional lecture and discussion (L/D), programmed textbook instruction (R), programmed text with lectures (RL), computer instruction (C), and computer instruction with lectures (C/L). Forty-five students were randomly assigned 9 to each method. After completing the course, the students took a 1-hour exam. In addition, a 10- minute retention test was administered 6 weeks later. Summary quantities are given Exam Retention Test Method x S; X The grand LD R R/L C/L 29.3 28.0 30.2 32.4 34.2 4.99 5.33 3.33 2.94 2.74 30.20 28.80 26.20 31.10 30.20 3.82 5.26 4.66 4.91 3.53 mean for the exam was 30.82, and the grand mean for the retention test was 29.30 a. Does the data suggest that there is a difference among the five teaching methods with respect to true mean exam score? Usea = .05 D. Using a 05 significance level, test the null hypothesis of no difference among the true mean retention test scores for the five different teaching methods. 1 Verizon 2:01 PM Expert Q&A Done Solve the following problem using R software. Please include all necessary code. The article "Computer-Assisted Instruction Augmented with Planned Teacher/Student Contacts (J. of Exp. Educ Winter, 1980-1981: 120-126) compared five different methods for teaching descriptive statistics. The five methods were traditional lecture and discussion (L/D), programmed textbook instruction (R), programmed text with lectures (RL), computer instruction (C), and computer instruction with lectures (C/L). Forty-five students were randomly assigned 9 to each method. After completing the course, the students took a 1-hour exam. In addition, a 10- minute retention test was administered 6 weeks later. Summary quantities are given Exam Retention Test Method x S; X The grand LD R R/L C/L 29.3 28.0 30.2 32.4 34.2 4.99 5.33 3.33 2.94 2.74 30.20 28.80 26.20 31.10 30.20 3.82 5.26 4.66 4.91 3.53 mean for the exam was 30.82, and the grand mean for the retention test was 29.30 a. Does the data suggest that there is a difference among the five teaching methods with respect to true mean exam score? Usea = .05 D. Using a 05 significance level, test the null hypothesis of no difference among the true mean retention test scores for the five different teaching methods
