## statistics - central tendency

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thumpaholden Plus on February 10, 2011

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# statistics - central tendency

 proportionIn a frequency distribution table, what does f/N represent?
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#### Definitions

proportion In a frequency distribution table, what does f/N represent?
measure of central tendency The most typical or representative score
population mean What does this variable represent: µ ?
Yes When calculating the median of a sample with an even number of scores, do you find the arithmetic average of the two middle scores?
mode The score or category that has the greatest frequency
mean Which measure of central tendency is most commonly used?
extreme scores or skewed distributions When do we use the median as the measure of central tendency? 1) _______, 2) when there are items with undetermined values or open ended distributions (eg >2) 3) Ordinal scale
when there are items with undetermined values or open ended distributions (eg >2) When do we use the median as the measure of central tendency? 1) Extreme scores or skewed distributions, 2) _______ 3) Ordinal scale
ordinal scale When do we use the median as the measure of central tendency? 1) Extreme scores or skewed distributions, 2) when there are items with undetermined values or open ended distributions (eg >2) 3) _______
median Which measure of central tendency do we use when reporting scores on an ordinal scale?
mode Which measure of central tendency do we use when reporting scores on a nominal scale?
mode Which measure of central tendency do we use when reporting scores on scale with discrete values (as opposed to continuous)?
changing any score in the distribution will change the meanCharacteristics of the mean 1) _________, 2) introducing or removing a score will change the mean (EXCEPTION: the score introduced or removed is equal to the mean) 3) if a constant is added/subtracted to/from each score in a distribution, the same constant will be added/subtracted to/from the mean 4) if every score is multiplied/divided by a constant, the mean will change in the same way
introducing or removing a score will change the mean (EXCEPTION: the score introduced or removed is equal to the mean)Characteristics of the mean 1) changing any score in the distribution will change the mean, 2) _________ 3) if a constant is added/subtracted to/from each score in a distribution, the same constant will be added/subtracted to/from the mean 4) if every score is multiplied/divided by a constant, the mean will change in the same way
if a constant is added/subtracted to/from each score in a distribution, the same constant will be added/subtracted to/from the mean Characteristics of the mean 1) changing any score in the distribution will change the mean, 2) introducing or removing a score will change the mean (EXCEPTION: the score introduced or removed is equal to the mean) 3) _________ 4) if every score is multiplied/divided by a constant, the mean will change in the same way
if every score is multiplied/divided by a constant, the mean will change in the same way Characteristics of the mean 1) changing any score in the distribution will change the mean, 2) introducing or removing a score will change the mean (EXCEPTION: the score introduced or removed is equal to the mean) 3) if a constant is added/subtracted to/from each score in a distribution, the same constant will be added/subtracted to/from the mean 4) _________
when reporting scores on a nominal scale When do we use the mode as the measure of central tendency 1) _______, 2) when reporting scores on scale with discrete values
when reporting scores on scale with discrete values When do we use the mode as the measure of central tendency 1) when reporting scores on a nominal scale, 2) _______

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