Hi all. I need to write code to score the PDDBI questionnaire. The manual for the PDDBI gives a mean and SD from an F test for each of 9 age group categories. I need to score 15 clusters of questions and produce a t-score for each one. Here's an example of the first cluster's means and SDs for the 9 age group where the first array index denotes the cluster and the second index denotes the
age group:
mean[1,1]=20.2; sd[1,1]=11.31; mean[1,2]=16.78; sd[1,2]=10.79; mean[1,3]=20.7; sd[1,3]=12.09; mean[1,4]=21.05; sd[1,4]=14.91; mean[1,5]=18.85; sd[1,5]=12.37; mean[1,6]=17.93; sd[1,6]=13.02; mean[1,7]=15.84; sd[1,7]=9.35; mean[1,8]=16.58; sd[1,8]=11.68; mean[1,9]=11.3; sd[1,9]=9.6;
An example given in the PDDBI manual follows:
Jack is 3 years and 3 months old, which puts him into age group 2.
mean[1,2]=16.78; sd[1,2]=10.79;
His raw score on cluster #1 is 32 points.
His t-score is 60 with a 90% CI of 52-66.
I've tried several methods, but can't figure out how to get the t-score and 90% CI.
Thanks for your help, Gordon
... View more