23 | 21 |

___of the observations are within 2 standard deviations (±2σ) of the mean | |

a summary table of data showing the number of observations in each of the defined numerically-ordered categories (or classes). | |

frequency polygon | |

a tabular summary of a set of data that accumulates information from class to class. This type of tabular summary can be constructed from frequency and relative frequency distribut | |

yield values that represent quantities (weight, salary, return-on-investment, GPA, # of children). | |

a tabular summary of a data showing the frequency (or percent) of items in each of several distinct categories. | |

There is an entire family of normal distributions, defined by the mean and variance | |

a tabular summary of a set of data showing the proportion of observations in each of the defined categories. | |

data | |

a graphical representation of data where slices of the pie, represented by degrees, are associated with the frequency or proportion of observations falling into a category. | |

Standard deviation | |

– a distribution in which one half of the data are a mirror image of the other half | |

right skewed | |

These numeric indices describe three major properties of numeric data | |

a measure of relative location that describes how far an individual observation is from the mean | |

The most important type of continuous random variable is characterized by a | |

_____of the observations are within 3 standard deviations (±2σ) of the mean | |

sample | |

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the manner in which data are distributed | |

a summary measure that describes a characteristic of an entire population. | |

These numeric indices describe three major properties of numeric data: | |

gives us the graph of the histogram that represents the continuous random variable. | |

those methods that use data from a smaller group (sample) to make conclusions/decisions about the characteristic of a larger group (population). | |

measure of variability that utilizes all data values. A measure that reflects how, on the average, observations vary or deviate from the mean. | |

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