Originality needed!!!!!!!!!!!!!! In Chapter 10, we will do inference on means an

Question

Originality needed!!!!!!!!!!!!!!

In Chapter 10, we will do inference on means and proportions from two populations. Our goal is to compare the two populations.

When making decisions, companies are always faced with decisions that allow them to choose between two actions. Should a company open a new store in one neighboor hold and not the other? Should a company terminate a delivery contract for one company and get another? Is a new drug effective against a particular ailment? Such decisions require us to separate the population and compare 2 samples. Based on the results, we can now make a decision.

For this week's posting, describe an example of how we can use difference in population means in hypothesis testing before making a business decision. Please give an independent sample example and paired (related) sample. explain your selection.

Explanation / Answer

Answer

Suppose the HR Department of a company is interested in devising means of enhancing employee productivity. The department comes up with a suggestion of reducing number of work-hours per week by 5 hours since they had read about this in a business journal.

To determine if number of work-hours per week by 5 hours should be reduced, the employee group is divided into two sub-groups – not necessarily of the same strength. Employees of one sub-group work to the normal work-hours (this group serves as the Control) and the other group works to the revised work-hours. The productivity of each group is measured over a fixed period. The data on productivity of the two groups when subjected to a 2-sample t-test for comparing means would help taking a meaningful and realistic decision.

In the above study, instead of dividing the employee population into two sub-groups, suppose, a randomly selected number of employees are monitored for individual productivity over a particular period under the existing work-hours. Then, the very same employees are put on the revised work-hours and productivity monitored for a fixed period duration of which is the same as in the earlier monitoring. In this case, since subjects under treatment are the same, a paired t-test would be most appropriate.

DONE

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