Complete the mcq:
1. A large mass of data can best be summarized pictorially by means of:
a. the range
b. a histogram
c. the frequency table
d. mean and standard deviation
2. For a symmetric distribution, the mean and median are
a. the same
b. always different
c. possibly the same, possibly different
d. insufficient information.
3. A distribution of 6 scores has a median of 21. If the highest score increases 3 points, the median will become ___________.
a. 21
b. 21.5
c. 24
d. Cannot be determined without additional information.
e. none of these
4. If you are told a population has a mean of 25 and a variance of 0, what must you conclude?
a. Someone has made a mistake.
b. There is only one element in the population.
c. There are no elements in the population.
d. All the elements in the population are 25.
e. None of the above.
5. Which of the following measures of central tendency tends to be most influenced by an extreme score?
a. median
b. mode
c. mean
6. Which of the following is not a measure of central tendency?
a. mean d. standard deviation
b. median e. none of these
c. mode