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MikeKim
Level IV

Interval, different in JMP, LOGICALLY SHOULD BE SAME.

Hi.

I faced a problem and appologize in advance that it might be a foolish question.

make simple, the situation is,

 

Data is

t={0,3,6,9,12}

y1={y11,y12,y13,y14,y15}

y2={y21,y22,y23,y24,y25}

y3={y31,....}

where y1,y2,y3 are the Batch number (Lot number)

So, there should be 3 respective regression line.

 

I tested the line comparability and the conclusion was "Different Slope and Different Intercept"

 

Thus, I put the Variables into the Model Fit platform as,

MikeKim_0-1723603515715.png

where G'=y and month=t.

 

The results were reasonable until the Confidence Interval is saved in Columns.

MikeKim_2-1723603930989.png

 

So far above method is method A.

 

However, by different way, method B,

Inputs are as follows,

MikeKim_1-1723603638810.png

 

The overall results seems SAME but, 

Confidence Interval is DIFFERENTLY calculated from method A.

MikeKim_3-1723603954643.png

(you can focus only to the last row, comparing the values to the previous data figure... there is huge gap.  204 <> 247)

so, my question is,

where the reason lies for this difference?

To be honest, as I let JMP deals the DATA as "Different Slope and Different Intercept" (of course in case of both method A and B),

The Confidence interval should be look like the results of the method B.

Method A's Confidence intervals are so much alike among the batch 1,2, and 3.

 

Please help me.

Sorry for long story and english.

10 REPLIES 10
MikeKim
Level IV

Re: Interval, different in JMP, LOGICALLY SHOULD BE SAME.

Hi, @MRB3855 

 

I am so happy now 

I finally succeeded as following your directions.

Take a look at the result.

There are something to be fixed to be look nicer, but they accomplished the initial goals!!!

I will keep do and investigate more, thank you so much!

MikeKim_0-1724392416703.png