# STAT 200-Mastry Quiz 2 solutions

In a statistical study the population is
A) the group of people from which the sample is taken
B) all of the people in the United States
C) all of the people in the world
D) the people who comprise the sample

Feedback: The population is the larger group of people from which the sample was taken
Points Earned: 0.0/1.0

2.
The sample mean is an estimate of:
A) The average value for people NOT in the population
B) The average value in the sample
C) The true population mean

Feedback: The sample mean is an estimate of the true population mean. It is, however, an exact measurement of the average value in the sample since the sample data is what is used to calculate the sample mean.
Points Earned: 0.0/1.0

3.
A summary measure calculated from the sample is called a(n):
A) parameter
B) statistic
C) outlier

Feedback: Sample measures are statistics; population measures are parameters
Points Earned: 1.0/1.0

4.
Which of the following is a parameter?
A) mu
B) x-bar
C) p-hat
D) Z

Feedback: x-bar and p-hat are sample statistics while Z is a test statistic.
Points Earned: 0.0/1.0