Your employer is concerned with employee morale.They administered a survey that asked employees to report the department they work in, how many hours a week they work, how long they've been at the company, and how happy they are in their position.First, form a causal hypothesis that could be tested with this data.Identify the dependent and independent variable.Next, identify a threat to the internal validity of this study and one possibility for addressing this threat.

My hypothesis is that the more hours an employee works, the less happy the person is in her position.The independent variable is the number of hours employees work a week.The dependent variable is employees reported happiness in their position.One threat to internal validity of this study would be if employees' names are on the surveys; employees might believe that they will be fired if they report unhappiness.One solution would be to anonymize the surveys and to have an external company analyze the data to help employees feel comfortable providing honest answers.