A well known investing company of Pakistan hired a number of new?

Answer 1

A well known investing company of Pakistan hired a number of new

employees. For the sake of their training they selected two methods. One

method was to introduce them with the practical work and show them

the real picture of the stock exchange, how it worked. The second

method was to train them through classroom training. To see the

effectiveness of each method they randomly selected the new

employees for each type of training. Before that they had filled out an

initial questionnaire with little difficulty level to see the previous

knowledge, the employees had about the stock exchange. They

assigned 10 employees for each type of training. Meanwhile Pakistan

television started a new program for investors. All the new employees took

keen interest in that program. During the training two employees from the

first group and one from the second group left the organization. Some of

the employees felt that the training program was quite lengthy. After the

training, organization conducted a second questionnaire with a higher

difficulty level than the previous one. The employees showed the same

results.

Questions:

In this scenario, whether the following threats to internal validity exist? Why

or why not, support your answer with logic.

A. History effects

B. Maturation effect

C. Testing effect

D. Instrumentation effect

E. Selection bias effect

F. Statistical regression

G. Mortality