QUIZ CHAPTER THREE

Psy302 Quantitative Methods

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

A. middle, most, and average

B. average, middle, and most

C. average, most, and middle

D. most, average, and middle

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

A. middle, most, and average

B. average, middle, and most

C. average, most, and middle

D. most, average, and middle

2. The size of a sample is represented by:

A. SB. ssC. nD. µE. π

2. The size of a sample is represented by:

A. SB. ssC. nD. µE. π

3. A researcher records 52 scores. What is the median position of these scores?

A. the 26th score in numeric order

B. the average of the 26th and 27th scores in numeric order

C. the 27th score in numeric order

D. It's not possible to know this without the raw scores.

3. A researcher records 52 scores. What is the median position of these scores?

A. the 26th score in numeric order

B. the average of the 26th and 27th scores in numeric order

C. the 27th score in numeric order

D. It's not possible to know this without the raw scores.

4. The ________ is the middle value in a distribution of scores that are listed in numeric order.A. meanB. medianC. modeD. rangeE. ogive

4. The ________ is the middle value in a distribution of scores that are listed in numeric order.A. meanB. medianC. modeD. rangeE. ogive

5. Which of the following will decrease the value of the mean?

A. deleting a score below the mean

B. adding a score below the mean

C. adding a score exactly equal to the mean

D. none of the above

5. Which of the following will decrease the value of the mean?

A. deleting a score below the mean

B. adding a score below the mean

C. adding a score exactly equal to the mean

D. none of the above

6. Locating a single score that is most representative or descriptive or all scores in a distribution is called:A. the populationB. central tendencyC. a histogramD. countsE. all of the above

6. Locating a single score that is most representative or descriptive or all scores in a distribution is called:A. the populationB. central

tendencyC. a histogramD. countsE. all of the above

7. The fact that the sum of the differences of scores from their mean is zero best illustrates that

A. the mean is at the center of a distribution

B. the mean is the “balance point” of a distribution

C. the mean is equal to zeroD. the mean can never be

negative

7. The fact that the sum of the differences of scores from their mean is zero best illustrates that

A. the mean is at the center of a distribution

B. the mean is the “balance point” of a distribution

C. the mean is equal to zeroD. the mean can never be

negative

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?A. meanB. medianC. modeD. rangeE. ogive

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?A. meanB. medianC. modeD. rangeE. ogive

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?A. meanB. medianC. modeD. rangeE. ogive

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?A. meanB. medianC. modeD. rangeE. ogive

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 isA. smallerB. largerC. the sameD. There is not

enough information to answer this question

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 isA. smallerB. largerC. the sameD. There is not

enough information to answer this question

10. A _____ skewed distribution is where a few outliers are substantially larger than most other scores. A. largelyB. hypotheticallyC. positivelyD. gratuitouslyE. badly

10. A _____ skewed distribution is where a few outliers are substantially larger than most other scores. A. largelyB. hypotheticallyC. positivelyD. gratuitouslyE. badly

The End