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Thread: Inquiry about means comparision of factorial experiments

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    Inquiry about means comparision of factorial experiments




    urgent and important dear, friends I need clarification about comparison between interaction of treatments. If I've factorial experiment (2*3) with three rep. and the design was RCBD, and I've the following data input:
    R I T H
    1 1 1 171.3
    1 1 2 143.6
    1 1 3 143.8
    1 2 1 168.4
    1 2 2 144.7
    1 2 3 161.1
    2 1 1 184.6
    2 1 2 174.2
    2 1 3 135.4
    2 2 1 166.2
    2 2 2 175
    2 2 3 143.4
    3 1 1 188.8
    3 1 2 173.6
    3 1 3 141.2
    3 2 1 166.4
    3 2 2 144.6
    3 2 3 152.6

    Then, when I analyze it by two-way ANOVA (in randomized blocks), the F-value was not significant of interactions (I*T), but when I looked to LSD I found that there is a significant differences:
    ***** Analysis of variance *****

    Variate: H

    Source of variation......d.f........s.s....... m.s......v.r......F pr.

    R stratum...................2........189.9.....94.9.....0.68

    R.*Units* stratum I.....1.........64.6.......64.6.....0.46...0.512 T..............................2.........2361.5...1180.7..8.43...0.007 I.T............................2.........600.6.....300.3...2.14...0.168
    Residual ...................10........1400.0....140.0

    Total.........................17......4616.6

    but when I made the analysis of interactions only as a non factorial experiment by one-way ANOVA with the following data input:
    R T H
    1 1 171.3
    1 2 143.6
    1 3 143.8
    1 4 168.4
    1 5 144.7
    1 6 161.1
    2 1 184.6
    2 2 174.2
    2 3 135.4
    2 4 166.2
    2 5 175 2
    6 143.4 3
    1 188.8 3
    2 173.6 3
    3 141.2 3
    4 166.4 3
    5 144.6 3
    6 152.6

    The result of analysis showed that the F-value was significant:
    ***** Analysis of variance *****

    Variate: H

    Source of variation......d.f.......s.s...........m.s.......v.r.......F pr.

    R stratum...................2........189.9.......94.9......0.60

    R.*Units* stratum T.....2.........2361.5....1180.7...7.43....0.007 Residual....................13........2065.2....158.9

    Total........................17........4616.6

    Why? And What happened, what's wrong? What's the correct? please, I hope to find urgent answer, and thankyou in advance

    Hazem Al-Ashwal

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    Re: Inquiry about means comparision of factorial experiments


    This was stuck in the moderator queue and I just saw it. Do you still want help with this?
    I don't have emotions and sometimes that makes me very sad.

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