# Biostatistics & Epidemiology Lecture 1 Histogram, Ogive or line chart,

rename
alchemist04's
version from
2016-06-25 00:35

## Section

Question | Answer |
---|---|

What is on Y axis (Vertical) of Histogram? | The frequency that determines the bar height |

What is on the X axis (Horizontal)? | The classes of data (e.g 10 - 19, 20 -29 etc), use class boundaries or class midpoints. Represented by the subject's name (e.g pulse rate or height rate or BP rate) |

Skewness means | Lack of symmetry in the histogram |

Positive skew (right skew) | has more low values |

Negative skew (left skew) | has more upper values |

Question | Answer |
---|---|

Relative frequency histogram | the frequency is represented by proportion or percentage and not regular numbers |

Normal distribution graph of Histogram | the graph has normal bell shape |

Platykurtic | (1) distribution is flat (2) more variability than other distribution |

Leptokurtic | (1) distribution peaked (2) lower variability than other distributions |

Question | Answer |
---|---|

What does a line chart tell us? (1) | (1) Estimation of possible trend |

What does a line chart tell us? (2) | (2) present a dat for a particular period of time |

What does a line chart tell us? (3) | (3) can be juxtaposed w/ results from a histogram |

What does a line chart tell us? (4) | (4) useful for charting possible trends over time |

Question | Answer |
---|---|

Pie Chart (1) | (1) depicts qualitative data as slices of a circle, in which the size of each slice is proportional to the frequency count for the category |

Pie Chart (2) | (2) use Pie Charts w/ qualitative data |

Pie Chart (3) | (3) Pie Charts is good for representing a small or large sample w/ percentages |

Pie Chart (4) | (4) Pie Charts are the best graphical representation of the data |

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