1. Psy302 Quantitative Methods QUIZ CHAPTER THREE

2. 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. 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: • S • ss • n • µ • π

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

6. 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. 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. 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. 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