Work Problem 2

work Problem 3

Work Problem 4

Please show work.

Problem 6. For the following experiment, test the null hypothesis of no difference among the three groups using: 1. The Seven-Step-Routine presented in class, 2. The .05 level of signicance, 3. The information from the experiment that follows, and 4. Attach your statistical analyses. Experiment: Fifteen students enrolled in an honors course in mathematics were divided at random into three groups of ve. Each group was randomly assigned one of three instructional methods, augmenting the traditional course materials: (1) programmed text, (2) Video tapes, (3) conversational computer programs. At the end of the course each student was given the achievement test. The results follow: Methods Observation (1) Programmed Text (2) Video Ta es 3 Com uter Pro rams 1 86 75 88 2 82 64 82 3 91 73 77 4 75 72 84 5 82 78 78 A researcher in instructional development wishes to determine whether or not mean achievement (as measured by the test) is the same under the three methods