**Normal distribution** refers to a frequency distribution, defined by a particular mathematical function that is bell shaped, is unimodal, is symmetrical, and has the same mean, median, and mode; a symmetrical, bell-shaped curve that describes the variability of certain characteristics within a population; most people fall at or near the average score, with relatively few at the extremes of the distribution. Normal distribution, moreover, is a frequency distribution in which the values or scores group around a mean. In neuropsychological testing , many test scores display such distributions.

# Glossary / Lexicon

## Normal distribution

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Standard deviation at psychology-glossary.com | ■■■■■■■ |

The Standard deviation refers to a measure which shows the average variability in population from the . . . Read More | |

Cross-sectional design at psychology-glossary.com | ■■■■■■ |

Cross-sectional design: Cross-sectional design refers to a research design using a large sample of the . . . Read More | |

Deviation IQ at psychology-glossary.com | ■■■■■■ |

Deviation IQ: Deviation IQ refers to an IQ obtained statistically from a person's relative standing in . . . Read More | |

Normal Distribution at environment-database.eu | ■■■■■ |

The Normal Distribution (statistical) is a frequency of data occurrence where most of the data points . . . Read More | |

Bar graph at psychology-glossary.com | ■■■■■ |

Bar graph: Bar graph refers to a frequency distribution graph in which a vertical bar indicates the frequency . . . Read More | |

Mean at psychology-glossary.com | ■■■■■ |

Mean: Mean is defined as the measure that represents an arithmetic average of a set of numbers. Mean . . . Read More | |

Histogram at psychology-glossary.com | ■■■■ |

Histogram: Histogram is defined as a frequency distribution graph in which a vertical bar indicates the . . . Read More | |

Parametric test at psychology-glossary.com | ■■■■ |

Parametric test: Parametric test is a test of statistical inference in which assumptions are made about . . . Read More | |

Nonparametric test at psychology-glossary.com | ■■■■ |

Nonparametric test: Nonparametric test refers to hypothesis test that does not require numerical scores . . . Read More | |

Central tendency at psychology-glossary.com | ■■■■ |

Central tendency: Central tendency refers to a statistical measure that identifies a single score that . . . Read More |