3. Fifteen trainees in a technical program are randomly assigned to three different types of instructional approaches, all of which are conc

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3. Fifteen trainees in a technical program are randomly assigned to three different types of instructional approaches, all of which are concerned with developing a specified level of skill in computer-assisted design. The achievement test scores at the conclusion of the instructional unit are reported in Table along with the mean performance score associated with each instructional approach. Use the analysis of variance procedure to test the null hypothesis that the three-sample means were obtained from the same population, using the 5 percent level of significance for the test.

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Claire 5 months 2021-12-21T19:07:56+00:00 1 Answer 0 views 0

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    2021-12-21T19:09:14+00:00

    Step-by-step explanation:

    Fifteen trainees in a technical program are randomly assigned to three different types of instructional approaches, all of which are concerned with developing a specified level of skill in computer-assisted design. The achievement test scores at the conclusion of the instructional unit are reported in the table below, along with the mean performance score associated with each instructional approach (high scores are better than low scores). Use the analysis of variance procedure to test the null hypothesis that the three sample means were obtained from the same population, using the 5 percent level of significance for the test.

    Instructional

    method

    Test

    scores

    Total

    scores

    Mean test

    scores

    A1

    86

    79

    81

    70

    84

    400

    80

    A2

    90

    76

    88

    82

    89

    425

    85

    A3

    82

    68

    73

    71

    81

    375

    75

    Best Answer

    n = 5 replications a = 3 treatment alpha,a = 0.05 overall mean u=(80+85+75)/3 = 80 SS treatment = 5 * [(80-80)^2 + (85-80)^2 + (75-80)^2] SS

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