Question: For each of the following situations, state whether the mean would be a statistic or a parameter. Explain your answer.
a. According to 1991 Canadian census data, the mean income (from employment only) of French speaking Canadians living in Ontario was $29,527, higher than the general population mean of $28,838.
b. In the 2004-2005 National Basketball Association season, the 30 teams won a mean 41.00 games.
c. The General Social Survey (GSS) includes a vocabulary test in which U.S. participants are given a series of words and asked to choose the appropriate synonym from a multiple-choice list of five words (e.g., beast with the choices afraid, words, large, animal, and separate). The mean vocabulary test score was 5.98.
d. The National Survey of Student Engagement (NSSE) asked students at participating institutions how often they discussed ideas or readings with their professors outside of class. Among the 19 national universities that made their data public, the mean percentage of U.S. students who responded "very often" was 8%.