Displaying 1 result from an estimated 1 matches for "righta_a".
2006 Apr 13
1
Subset rows over multiple columns
...in the data below the
value R0000160 is found in the first and second columns (itd_1 and
itd_45). These data are student responses to multiple choice test items
from a computer adaptive test. So, the variable itd_1 denotes that item
i was presented to student k in position t and then the variable
righta_a and righta_b denotes a correct (1) or incorrect response to
that item when it was presented.
My goal is to get the p-value (mean of the binary variable) for each
item irrespective of when it was presented to the student.
So, in the sample case below, I would use all elements in righta_a
(except f...