Untreated score before manipulation or processing.

Frequency distribution

List of scores and number of times a score occurred. Allows one to easily identify the most frequent scores and is helpful in identifying where an individual score falls relative to the rest of the group.

Bar graph of class intervals and frequency of set scores.

Grouping scores by a predetermined range. Derived from your frequency distribution and are groupings of scores that have a predetermined range.

Line graph of class intervals and frequency of a set of scores.

cumulative distribution

Line graph to examine percentile rank. Sometimes called ogive curve.

Board developed by sir Francis Galton to demonstrate bell-shaped curve.

A bell shaped distribution that human traits tend to fall along.

Test scores not falling along a normal curve.

Negatively skewed curve

Majority of scores at upper end.

Positively skewed curve

Majority of scores at lower end.

Arithmetic average of a set of scores.

Score where 50% fall above and 50% below

Most frequently occurring score.

Difference between highest and lowest score plus 1.

Middle 50% of scores around median.

indicates the percentage of scores in a comparison group that fall at or below a given score, showing where that score stands relative to others.

the most commonly used distribution in statistics

Positively skewed distribution

a data distribution where most data points cluster at the lower end of the scale, creating a long tail that extends to the right.

measures how many standard deviations a data point is away from the mean of a dataset.

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Psych test ch 6

Question	Answer
Raw score	Untreated score before manipulation or processing.
Frequency distribution	List of scores and number of times a score occurred. Allows one to easily identify the most frequent scores and is helpful in identifying where an individual score falls relative to the rest of the group.
Histogram	Bar graph of class intervals and frequency of set scores.
Class interval	Grouping scores by a predetermined range. Derived from your frequency distribution and are groupings of scores that have a predetermined range.
Frequency polygon	Line graph of class intervals and frequency of a set of scores.
cumulative distribution	Line graph to examine percentile rank. Sometimes called ogive curve.
Quincunx	Board developed by sir Francis Galton to demonstrate bell-shaped curve.
Normal curve	A bell shaped distribution that human traits tend to fall along.
Skewed curve	Test scores not falling along a normal curve.
Negatively skewed curve	Majority of scores at upper end.
Positively skewed curve	Majority of scores at lower end.
Mean	Arithmetic average of a set of scores.
Median	Score where 50% fall above and 50% below
Mode	Most frequently occurring score.
Range	Difference between highest and lowest score plus 1.
Interquartile range	Middle 50% of scores around median.
Standard deviation	How scores vary from the mean.
Percentile rank	indicates the percentage of scores in a comparison group that fall at or below a given score, showing where that score stands relative to others.
Normal distribution	the most commonly used distribution in statistics
Positively skewed distribution	a data distribution where most data points cluster at the lower end of the scale, creating a long tail that extends to the right.
Z-scores	measures how many standard deviations a data point is away from the mean of a dataset.

Created by: balperso2022

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