1. Psy302 Quantitative Methods
QUIZ CHAPTER THREE

2. middle, most, and average average, middle, and most
1. What terms refer to each of the following measures, respectively: mean, median, and mode.
middle, most, and average
average, middle, and most
average, most, and middle
most, average, and middle

3. middle, most, and average average, middle, and most
1. What terms refer to each of the following measures, respectively: mean, median, and mode.
middle, most, and average
average, middle, and most
average, most, and middle
most, average, and middle

4. 2. The size of a sample is represented by:ss n π

5. 2. The size of a sample is represented by:ss n π

6. 3. A researcher records 52 scores
3. A researcher records 52 scores. What is the median position of these scores?
the 26th score in numeric order
the average of the 26th and 27th scores in numeric order
the 27th score in numeric order
It's not possible to know this without the raw scores.

7. 3. A researcher records 52 scores
3. A researcher records 52 scores. What is the median position of these scores?
the 26th score in numeric order
the average of the 26th and 27th scores in numeric order
the 27th score in numeric order
It's not possible to know this without the raw scores.

8. 4. The ________ is the middle value in a distribution of scores that are listed in numeric order.
mean
median
mode
range
ogive

9. 4. The ________ is the middle value in a distribution of scores that are listed in numeric order.
mean
median
mode
range
ogive

10. 5. Which of the following will decrease the value of the mean?
deleting a score below the mean
adding a score below the mean
adding a score exactly equal to the mean
none of the above

11. 5. Which of the following will decrease the value of the mean?
deleting a score below the mean
adding a score below the mean
adding a score exactly equal to the mean
none of the above

12. 6. Locating a single score that is most representative or descriptive or all scores in a distribution is called:
the population
central tendency
a histogram
counts
all of the above

13. 6. Locating a single score that is most representative or descriptive or all scores in a distribution is called:
the population
central tendency
a histogram
counts
all of the above

14. 7. The fact that the sum of the differences of scores from their mean is zero best illustrates that
the mean is at the center of a distribution
the mean is the “balance point” of a distribution
the mean is equal to zero
the mean can never be negative

15. 7. The fact that the sum of the differences of scores from their mean is zero best illustrates that
the mean is at the center of a distribution
the mean is the “balance point” of a distribution
the mean is equal to zero
the mean can never be negative

16. 8. A researcher records the time (in seconds) that participants arrive late for a study. Assuming these data are normally distributed, which measure of central tendency is most appropriate to describe these data?
mean
median
mode
range
ogive

17. 8. A researcher records the time (in seconds) that participants arrive late for a study. Assuming these data are normally distributed, which measure of central tendency is most appropriate to describe these data?
mean
median
mode
range
ogive

18. 8. A researcher records the time (in seconds) that participants arrive late for a study. Assuming these data are positively skewed, which measure of central tendency is most appropriate to describe these data?
mean
median
mode
range
ogive

19. 8. A researcher records the time (in seconds) that participants arrive late for a study. Assuming these data are positively skewed, which measure of central tendency is most appropriate to describe these data?
mean
median
mode
range
ogive

20. 9. The distribution of personal income for U. S
9. The distribution of personal income for U.S. citizens is positively skewed. If the median annual income is $44,000, this implies that the mean annual income is
smaller
larger
the same
There is not enough information to answer this question

21. 9. The distribution of personal income for U. S
9. The distribution of personal income for U.S. citizens is positively skewed. If the median annual income is $44,000, this implies that the mean annual income is
smaller
larger
the same
There is not enough information to answer this question

22. 10. A _____ skewed distribution is where a few outliers are substantially larger than most other scores.
largely
hypothetically
positively
gratuitously
badly

23. 10. A _____ skewed distribution is where a few outliers are substantially larger than most other scores.
largely
hypothetically
positively
gratuitously
badly

24. The End