The Rathburn Manufacturing Company makes electric wiring, which it sells to contractors in construction industry. Approximately 900 electric contractors purchase wire from the Rathburn annually. Rathburn's director of marketing wants to find out electric contractors' satisfaction with Rathburn's wire. He developed questionnaire which yields satisfaction score between 10 and 50 for participant responses. A random sample of 35 of the 900 contractors is asked to complete satisfaction survey. The satisfaction scores for 35 participants are averaged to produce mean satisfaction score.
a) Determine the population for this study?
b) Determine the sample for this study?
c) Determine the statistic for this study?
d) What would be a parameter for this study?