3. The personnel director of a corporation will study the overtime work during the previous year for the 2,575 clerical workers. A sample of 100 of these workers will be chosen at random from the files. The average and the standard deviation of the overtime hours will be calculated and the number of these employees who worked more than 75 hours of overtime will be recorded. For each of the following, state whether it is a statistic or a parameter. (6 pts)

Question

3.	The personnel director of a corporation will study the overtime work during the previous year for the 2,575 clerical workers. A sample of 100 of these workers will be chosen at random from the files. The average and the standard deviation of the overtime hours will be calculated and the number of these employees who worked more than 75 hours of overtime will be recorded. For each of the following, state whether it is a statistic or a parameter.  (6 pts)

a)	The average number of overtime hours for the 2,575 employees. 
b)	The standard deviation of overtime hours for the 100 workers. 
c)	The standard error of the average.

d)	The proportion of clerical workers in the company who worked more than 75 hours overtime last year

PsyDAG · Answer

A parameter is a value related to the total population, while statistic only relates to a sample, a portion of the population. That should help you to come to your own answers.