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the boundaries for each class; These are very subjective, must be defined so that all observations are included. | |

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

frequency polygon | |

discrete | |

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

The normal probability distribution is bell-shaped and symmetric. | |

class boundries | |

sample | |

a sequence of raw data in rank order from the smallest to the largest observation. | |

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

statistic | |

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. | |

The curve is asymptotic, meaning that it approaches the horizontal axis at both ends | |

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 | |

If the shape of the distribution/histogram is bell- shaped, we can make the following statements | |

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

chart where vertical bars are plotted in descending order, combined with a cumulative percentage line | |

graphical representation of data where each category is depicted by a bar representing the frequency or proportion of observations falling into a category. | |

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

the manner in which data are distributed | |

It provides the theoretical framework for statistical inference through | |

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

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

those methods involved in the collection, summarizing (numerically or graphically), presenting, and analyzing a set of data in order to describe the various features of that data s | |

The measures of center, (mean, median, mode), are identical and occur at the point where the normal curve is highest | |

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