Statistical Concepts: Raw Scores

Question 1

raw scores

Answer 1

untreated score before manipulation or processing

Question 2

histogram

Answer 2

bar graph of class intervals and frequency of a set of scores

Question 3

class interval

Answer 3

grouping scores by a predetermined range

Question 4

frequency polygon

Answer 4

line graph of class intervals and frequency of a set of scores

Question 5

cumulative distribution

Answer 5

line graph to examine percentile rank of a set of scores

gives information about percentile rank

Question 6

quincunx

Answer 6

board developed by Sir Francis Galton to demonstrate a bell-shaped curve

Question 7

normal curve

Answer 7

bell-shaped distribution that human traits tend to fall along

Question 8

skewed curve

Answer 8

test scores not falling along a normal curve

Question 9

negatively skewed curve

Answer 9

majority of scores at upper end

Question 10

positively skewed

Answer 10

majority of scores at upper end

Question 11

mean

Answer 11

arithmetic average of a set of scores

Question 12

median

Answer 12

score where 50% fall above and 50% fall below

Question 13

mode

Answer 13

most frequently occurring score

Question 14

range

Answer 14

difference between highest and lowest score plus 1

Question 15

interquartile range

Answer 15

middle 50% of scores around the median

Question 16

standard deviation

Answer 16

how scores vary from the mean

Question 17

frequency distribution

Answer 17

orders a set of scores from high to low and lists the corresponding frequency of each score

Question 18

kurtosis

Answer 18

statistic that reflects peakedness or flatness of a distribution relative to a normal distribution