Descriptive Statistics

Question 1

name of the computed average of a series of raw data

Answer 1

mean: groups / blocks data

Question 2

name of the middle score of each block of trails after the scores within each block have been rank ordered

Answer 2

median: groups / blocks data

Question 3

name of the score that occurs most often

Answer 3

mode: groups / blocks data

Question 4

which two of the following are used when a set of scores is severely skewed: mean, median, mode

Answer 4

median and mode

Question 5

name of the difference between the largest and smallest scores in a distribution plus 1

Answer 5

range: measures dispersion of data

Question 6

name the computation:

(the sum of squared scores - the correction term) divided by N -1

Answer 6

variance

Question 7

name the computation:

square root of the variance

Answer 7

standard deviation

Question 8

name the computation:

the square of the sum of all scores divided by the total number of scores used in the computation

Answer 8

correction term

Question 9

name the computation:

square root of… [(the sum of squared scores - the correction term)] divided by [N(N - 1)]

Answer 9

standard error of the mean