measure variations Flashcards
defined as a specific point in a distribution that has given percent of the cases below it.
centile or percentile
measure which divides the distribution into 100 parts
centile or percentile
this tells how many percent of the cases got below the rank position
percentile rank
this is the score of value that corresponds to the given percentile rank
percentile point
t or f. a score by itself is meaningless unless it is compared with other scores and other statistics
t
four most commoly used measures of variation are: range, mean, deviation, standard deviation and ___
variance
linear measure
range, mean deviation and standard deviation
area measure
variance
simplest measure of data variation
range
______ or ______ is widely used in educational aspects in reporting the result of standardized test. they give an adequate indication of an individual rank in a group.
centile of percentile
t or f. centiles allow comparison of scores from different distributions
t
t or f. centiles should be averaged
f
t or f. centiles does not indicate the person’s relative position in the standardized sample
f
t or f. centiles are regarded as ranks in a group of 100.
t
t or f. the lower the percentile, the poorer is the individual’s standing
t
t or f. the mean is the proper measure of the central tendency for percentiles.
*write true if correct. if false, underline the wrong word and type the right one.
f. median.
divides the distribution into 100 equal parts
percentile
divides the distribution into 4 equal parts
quartile
divides the distribution into 10 equal parts
decile
t or f. if we don’t know the mean of the distribution of a given variable, we canot determine whether a particular score is higher or lower than the mean
t
t or f. to interpret a score/observation fully, no information is required in concerning the dispersion of the scores/observations.
f
this describes how much the numbers within a set of dat vary can give more information about the score
measures of variability
t or f. variability or spread or dispersion may be measured in terms of the closeness between particular data values
f
t or f. variability or spread or dispersion may be measured in terms of the average deviation of individual values about the central value
t
difference between the largest and smallest measurements
range
t or f. range is stable and very reliable because its measure depends totally on two scores of a distribution-the highest and lowest
f
t or f. range, as a result, foves a crude index of dispersion of a distibution thus ignoring the spread of all scores
t
