Procedures

The PQ&R Corporation has developed a collection of training materials and skills tests for activities that accurately represent the types of tasks performed by employees in a production environment. Before any instruction is given, each trainee is asked to perform the training battery—a series of tasks for which they are about to receive training. Immediately on completion of instruction, trainees are again asked to perform the training battery to assess the effectiveness of instruction. After performing the battery for the second time, the trainees become employees of PQ&R. On completion of their six-month introductory period of employment, trainees are required to perform the training battery a third time.


Trainee Report

The following graphic is used to represent an individual trainee's scores on the training battery. The scores range from 0 to 100 points corresponding to how well the trainee performed the tasks in the battery. The graphic consists of a unique trainee identifier (composed of his or her session number and a letter), that trainee's pretraining and posttraining scores, and a plus sign (+) indicating that trainee's six-month score. The pretraining score is typically the lowest.

1682522596_644941e4d8687.png


Trainees by Session
The results for the three training sessions conducted in the most recent calendar year are shown in the graphic. Each session had exactly eight trainees and no trainee was in more than one session. The results for each session are given twice—on the left in pretraining-score order and on the right in posttraining-score order.1682522642_64494212f0b3e.png


For each of the following statements about the scores in Session 1, Session 2, and Session 3, select Yes if the statement is supported by the information provided. Otherwise, select No.


YES NO
For at least one trainee, the posttraining score was greater than 3 times the pretraining score.
The data for Session 1 exhibit a positive correlation between pretraining and posttraining scores.
For the three sessions, the range of pretraining scores is least for Session 2.
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