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  • FF replied to the topic Z=6, Cpk=1.5 or Ppk=1.5 in the forum General 17 years, 2 months ago

    The following statements are equivalent if you assume Zshift=1.5:
    Zst=6, Zlt = 4.5, Cpk=2, Ppk = 1.5, DPMOlt = 3.4
     

  • FF replied to the topic 2 way anova in the forum General 17 years, 8 months ago

    …… I must have some problems in pasting data from Minitab. I hope this time it works:

    Analysis of Variance (Balanced Designs)

    Factor     Type Levels Values
    Temp      fixed      4     1     2     3     4
    Oven     random      4     A     B     C     D

    Analysis of Variance for Sigma  

    Source       DF         SS    …[Read more]

  • FF replied to the topic 2 way anova in the forum General 17 years, 8 months ago

    Brookiep,
    you are right, I erroneously posted a wrong analysis where I had removed some data. This is the correct analysis with the Oven considered as a random factor:
      

    Analysis of Variance (Balanced Designs)
    Factor Type Levels Values
    Temp fixed 4 1 2 3 4
    Oven random 4 A B C D
    Analysis of Variance for Sigma
    Source DF SS   MS   …[Read more]

  • FF replied to the topic 2 way anova in the forum General 17 years, 8 months ago

    Sorry for the bad format in the previous post
     

    Analysis of Variance (Balanced Designs)

    Factor     Type Levels Values
    Temper    fixed      3   350   400   450
    Oven typ random      4     A     B     C     D

    Analysis of Variance for Sigma Y

    Source             DF         SS         MS       F      P
    Temper   …[Read more]

  • FF replied to the topic 2 way anova in the forum General 17 years, 8 months ago

    Thank you all for your replies,
    considering that the Oven has a small effect compared to Temperature, I’m wondering if the factor Oven can ve considered just a blocking factor. In fact the different ovens simply heat up the components under analysis, and maybe there souldn’t be any reasonable difference among them.
    Using a Balanced anova where…[Read more]

  • FF replied to the topic 2 way anova in the forum General 17 years, 8 months ago

    Thanks K.Subbiah,
    these are the F values and the MSE in case the interaction is included
    Temp          3    4107.09    1369.03  471.06  0.000
    Oven          3     142.59      47.53   16.35  0.000
    Temp*Oven     9     601.53      66.84   23.00  0.000
    Error        16      46.50       2.91
    Total        31    4897.72
     
    This is the res…[Read more]

  • This is how I would organize data to compare processing time between regions (ri) and center types (cj)
    For example: i=3, j=4
     

    r1
    r2
    r3

    c1
    12
    8
    15

    c2
    7
    8
    13

    c3
    13
    12
    15

    c4
    7
    8
    6
    p=0.848

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