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# Psychology Module 5

Term | Definition |
---|---|

frequency distribution | a list of scores ordered from highest to lowest |

mode | the score that occurs most frequently in a distribution |

mean | The mathematical average of a distribution, obtained by adding the scores and then dividing by the number of scores |

median | The middle score in a ranked distribution: half the scores are above it and half are below it. |

skewed | Distorted; not evenly distributed around the mean |

range | The difference between the highest and lowest scores in a distribution |

standard deviation | A computed measure of how much scores vary around the mean score of a distribution |

normal distribution | A frequency distribution that is shaped like a symmetrical bell. |

percentage | A comparative statistic that compares a score to a perfect sore of 100 points. |

percentile rank | A comparative statistic that compares a score to other sores in an imaginary group of 100 individuals. |

correlation coefficient | A statistical measure of the strength of the relationship between two variables. |

inferential statistics | Statistics that can be used to make a decision or reach a conclusion about data. |

statistical significance | A statistical statement of how likely it is that a result occurred by chance alone. |