To increase productivity, workers went through a training program. The management wanted to know the effectiveness of the program. A sample of seven workers was taken and their daily production rates before and after the training are shown below.

Worker Before After

$11822$

$22325$

$32527$

$42225$

$52024$

$62119$

$71920$

Based on the data, the training program is:

Question $23$ options:

neither effective nor ineffective.

None of the above

effective.

ineffective.