I am analysing the size and shape of a particular population of people using 25 different body measurements. I completed a PCA/factor analysis in SPSS which suggested 3 factors.
The next step is to identify "boundary manikins" that represent the extremes of each factor so I can then understand the size/shape of the extremes of this population. The step to do this states "This process was made on applying z-scores to the normalised factor outputs gained from the PCA process for each participant. 95th percentile z-scores were selected in the fashion demonstrated in the Figure (see attached) with the output identifying the Z-scores for each factor for each of the boundary manikins - I'm unsure how how to undertake this in SPSS and exactly what it requires me to do.
Any assistance would be greatly appreciated. Cheers
The next step is to identify "boundary manikins" that represent the extremes of each factor so I can then understand the size/shape of the extremes of this population. The step to do this states "This process was made on applying z-scores to the normalised factor outputs gained from the PCA process for each participant. 95th percentile z-scores were selected in the fashion demonstrated in the Figure (see attached) with the output identifying the Z-scores for each factor for each of the boundary manikins - I'm unsure how how to undertake this in SPSS and exactly what it requires me to do.
Any assistance would be greatly appreciated. Cheers