quant-chapter 3

Question 1

central tendency

Answer 1

statistical measures for locating a single score that is most representative or descriptive of all scores in a distribution

Question 2

mean

Answer 2

sum of a set of scores in a distribution, divided by the total number of scores summed, population/sample mean, interval and ratio

Question 3

weighted mean

Answer 3

combined mean of two or more groups of scores, where the number of scores in each group is disproportionate or unequal,

Question 4

median

Answer 4

middle value is a distribution of data listed in numeric order, graphed in cumulative percent distribution, ordinal

Question 5

mode

Answer 5

value in a data set that occurs most often or most frequently, nominal

Question 6

add a score above the mean makes

Answer 6

the mean increase

Question 7

add a score below the mean makes

Answer 7

the mean decrease

Question 8

delete a score below the mean makes

Answer 8

the mean increase

Question 9

delete a score above the mean makes

Answer 9

the mean decrease

Question 10

add/delete score equal to mean makes

Answer 10

the mean not change

Question 11

replacing a score will

Answer 11

increase the mean with higher score, decrease the mean with lower score

Question 12

normal distribution

Answer 12

half scores above the mean/median/mode, half below

Question 13

skewed distribution

Answer 13

scores that includes outlier or scores that fall substantially above or below most other scores in a data set

Question 14

positively skewed distribution

Answer 14

distribution where a few outliers are substantially larger than most, mean>mode

Question 15

negatively skewed distribution

Answer 15

distribution of scores where a few outliers are substantially smaller than most, mode>mean

Question 16

modal distribution

Answer 16

distribution of scores where one or more scores occur most often or most frequently

Question 17

unimodal distribution

Answer 17

distribution of scores where one score occurs most often or most frequently, one mode

Question 18

bimodal distribution

Answer 18

distribution of scores where two scores occur most often or most frequently, 2 modes

Question 19

multimodal distributions

Answer 19

more than two modes

Question 20

nonmodal distributions

Answer 20

no mode