measure variations

Question 1

defined as a specific point in a distribution that has given percent of the cases below it.

Answer 1

centile or percentile

Question 2

measure which divides the distribution into 100 parts

Answer 2

centile or percentile

Question 3

this tells how many percent of the cases got below the rank position

Answer 3

percentile rank

Question 4

this is the score of value that corresponds to the given percentile rank

Answer 4

percentile point

Question 5

t or f. a score by itself is meaningless unless it is compared with other scores and other statistics

Answer 5

t

Question 6

four most commoly used measures of variation are: range, mean, deviation, standard deviation and ___

Answer 6

variance

Question 7

linear measure

Answer 7

range, mean deviation and standard deviation

Question 8

area measure

Answer 8

variance

Question 9

simplest measure of data variation

Answer 9

range

Question 10

______ 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.

Answer 10

centile of percentile

Question 11

t or f. centiles allow comparison of scores from different distributions

Answer 11

t

Question 12

t or f. centiles should be averaged

Answer 12

f

Question 13

t or f. centiles does not indicate the person’s relative position in the standardized sample

Answer 13

f

Question 14

t or f. centiles are regarded as ranks in a group of 100.

Answer 14

t

Question 15

t or f. the lower the percentile, the poorer is the individual’s standing

Answer 15

t

Question 16

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.

Answer 16

f. median.

Question 17

divides the distribution into 100 equal parts

Answer 17

percentile

Question 18

divides the distribution into 4 equal parts

Answer 18

quartile

Question 19

divides the distribution into 10 equal parts

Answer 19

decile

Question 20

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

Answer 20

t

Question 21

t or f. to interpret a score/observation fully, no information is required in concerning the dispersion of the scores/observations.

Answer 21

f

Question 22

this describes how much the numbers within a set of dat vary can give more information about the score

Answer 22

measures of variability

Question 23

t or f. variability or spread or dispersion may be measured in terms of the closeness between particular data values

Answer 23

f

Question 24

t or f. variability or spread or dispersion may be measured in terms of the average deviation of individual values about the central value

Answer 24

t

Question 25

difference between the largest and smallest measurements

Answer 25

range

Question 26

t or f. range is stable and very reliable because its measure depends totally on two scores of a distribution-the highest and lowest

Answer 26

f

Question 27

t or f. range, as a result, foves a crude index of dispersion of a distibution thus ignoring the spread of all scores

Answer 27

t