In: Statistics and Probability
Subject: Statistics
Please show complete work for the multiple-choice questions below
1. If the mean and median are equal, you know
that the:
a. distribution is symmetrical
b. distribution is skewed
c. distribution is normal
d. mode is equal to the median
2. The mean, median and mode are all measures
of:
a. the midpoint of the distribution
b. the most common score
c. percentile ranks
d. variability
3. Which of the following characterizes the
mean?
a. The sum of all the measurements divided by the
number of measurements.
b. The point in a distribution about which the
summed deviations equal zero.
c. The point in a distribution about which the sum
of the squared deviations
is minimal.
d. All of the above.
4. Which statistic does not belong with the
others?
a. range
b. mean
c. variance
d. standard deviation
5. Which of the following samples exhibits the
least variability?
a. 2,4,6,8,l0,l2
b. 2,2,3,ll,l2,l2
c. 2,3,4,l0,ll,l2
d. 2,6,7,7,8,l2