23 | 21 |

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

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

population | |

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

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

frequency polygon | |

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

The random variable X has an infinite range. | |

discrete | |

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

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 | |

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

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

Approximately ____% of the observations are within 1 standard deviation (±1σ) of the mean | |

the manner in which data are distributed | |

continuous | |

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

_____of the observations are within 3 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). | |

variable | |

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

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

It provides the theoretical framework for statistical inference through | |

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

The total area under the curve is equal to one. | |

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