Dear All,
I have been analysing a two factorial (3*4) RCBD repeated measures design by using the mixed model approach in JMP. Above is a section of the report I got. Why are the estimates zero. Other information include about the analysis include:
1. 14 continuous variables measured four times at unequal time periods
2. All the three covariance structures I tried (AR1, Toeplizt and spatial power) had similar fixed effects but of different magnitudes
3. However for three variables the repeated effects covariance parameter estimates were zero; two of these variables were angular (i.e. in degrees) and the other ratio ( in the range of zeros (0.2 to 0.9)
Please I want to know why the estimates are zero.
NB: there was no random effect as recommended by the JMP instructions I had.
Thank you in advance