As the facility management manager, you received complaints from several departments in the company.

The employees were complaining on the air-conditioners that did not work accordingly and affect their daily productivities. You are interested to investigate the difference of average temperature existing between two work areas in which one has the most complaints in the company and the other one hardly makes any complaints. You recorded the temperatures (in °C) for both work areas and get the following information:

Work Area Temperature (in °C)

Sample Size Mean Standard Deviation With most complaints 35 22.5 3.564 Hardly makes complaints 22 23.4 2.176

a. Before determining your investigation, conduct a hypothesis to determine whether the population variances are equal. Use alpha = 0.1.

b. Based on the outcome in part

a, identify the appropriate test you should use to determine your investigation.