# Question

The target population is all stocks in the S&P 500 index. Is each of the following a parameter or a statistic?
a. The average price/earnings ratio for all 500 stocks in the S&P index.
b. The proportion of all stocks in the S&P 500 index that had negative earnings last year.
c. The proportion of energy-related stocks in a random sample of 50 stocks.
d. The average rate of return for 20 stocks recommended by a broker.

Sales0
Views43