Coefficients of Interaction Term(Time*Batch) Involved lm of R and Minitab Stability Study Analysis Coefficients table values not matching

this is the R code to calculate the Coefficients for the interaction term. in this for each batch and batch * time term coefficient and P Value and other values are not matching with Minitab stability study output Coefficients table for each batch and batch*time term.

     mlm<- lm(response ~ time*batch, data=dataframe) 
     summary(model)$coefficients

dataset used.

RESP TIME BATCH
111.1 0 1
109.2 3 1
108.0 6 1
104.2 9 1
107.8 12 1
105.1 18 1
108.5 22 1
106.3 24 1
107.7 0 2
108.1 3 2
106.4 6 2
103.3 9 2
106.5 12 2
104.9 18 2
105.8 22 2
105.8 0 3
108.2 3 3
104.5 6 3
110.4 9 3
103.7 12 3
107.0 18 3
110.8 0 4
103.4 3 4
103.2 6 4
99.2 9 4
100.7 12 4
107.7 0 5
104.8 3 5
102.4 6 5
109.6 9 5
111.5 12 5
106.4 0 6
101.7 3 6
101.6 6 6
100.2 9 6
106.2 12 6
104.7 0 7
103.8 3 7
104.4 6 7
103.0 9 7
111.7 12 7
105.3 18 7
104.5 21 7
99.0 24 7
104.7 0 8
105.4 3 8
106.2 6 8
104.0 9 8
107.3 12 8
106.0 18 8
105.3 21 8
104.2 24 8
98.2 0 9
100.2 3 9
104.8 6 9
102.4 9 9
105.1 12 9
103.4 18 9
107.3 22 9
99.9 24 9
98.2 0 10
104.0 3 10
105.0 6 10
101.3 9 10
106.5 12 10
104.7 18 10
107.3 22 10
100.0 24 10
102.9 0 11
101.7 3 11
104.1 6 11
100.2 9 11
106.2 12 11
104.3 18 11
105.8 22 11
100.5 24 11
102.9 0 12
104.0 3 12
105.0 6 12
104.0 9 12
103.8 12 12
104.7 18 12
107.2 22 12
99.6 24 12
102.9 0 13
102.6 3 13
107.0 6 13
105.6 9 13
103.2 12 13
99.1 18 13
100.7 22 13
106.3 24 13

here is the minitab result

Minitab is doing some kind of normalization--I don't know what it is. Note that you have 13 categories of batch and that all 13 dummies plus a constant are reported. That's one more coefficient than is possible without some kind of normalization.

This topic was automatically closed 42 days after the last reply. New replies are no longer allowed.

If you have a query related to it or one of the replies, start a new topic and refer back with a link.