a) The number of times a magazine is removed from the shelf of the magazine rack and the length of time for which the magazine is removed can be acquired for each
magazine.
b) The number of times a magazine is removed from the shelf of the magazine rack and the average length of time for which the magazine is removed can be acquired for
each user age group for each magazine.
c) The number of times a magazine is removed from the shelf of the magazine rack can be acquired for each day of the week and each gender of the user for each magazine.
d) The duplication in cases where the same person removes a magazine several times is eliminated, and the number of persons who remove a magazine from the shelf of the magazine rack can be acquired for each magazine.