1. A small college has 500 Freshmen, 400 Sophomores, 350 Juniors, and 300 Seniors. They wish to conduct a survey of their students and find a simple random sample of 50 Freshmen, 40 Sophomores, 35 Juniors, and 30 Seniors. The overall sample is
A. a stratified sample.
B. a simple random sample.
C. a multi-stage sample.
2. In a controversial election district, 73% of registered voters are Democrat. A random survey of 500 voters had 68% Democrats. Are the bold numbers parameters or statistics?
A. Both are statistics.
B. 73% is a parameter and 68% is a statistic.
C. 73% is a statistic and 68% is a parameter.
3. Which sample size will give the least bias to a statistic?
A. n = 100
B. n = 500
C. We don't know.