The degree of success at mastering a skill often depends on

The degree of success at mastering a skill often depends on the method used to learn the skill. An article reported on a study involving the following four learning methods: (1) visual contact and imagery, (2) nonvisual contact and imagery, (3) visual contact, and (4) control. There were 20 subjects randomly assigned to each method. The summary information on putting performance score is listed in the following table.

(a) Is there sufficient evidence to conclude the mean putting performance score is not the same for the four methods? (Use Table 6 in Appendix A. Round all your intermediate calculations to two decimal places.)
There  ---Select---( is or is not) sufficient evidence to conclude that the mean putting performance score is not the same for the four methods.

(b) Let ₁, ₂, ₃, and ₄ represent the true performance score for learning methods 1, 2, 3 and 4, respectively. Calculate the corresponding 95% T-K intervals. (Use Table 7 in Appendix A. Give the answers to two decimal places.)

Select the groups of means which are not significantly different. (Select all that apply.)

You may need to use the appropriate table in Appendix A to answer this question.

₄₃₂₁

₄₃₂

₃₂₁

₄3

₃₂

_{2 1}

Solution