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# CCGPSAlg-Unit 4

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

Association | A connection between data values |

Bivariate data | Pairs of linked numerical observations |

Box-and-Whisker Plot | A diagram that shows the five-number summary of a distribution |

Center | Measures of center refer to the summary measures used to describe the most “typical” value in a set of data |

Conditional Frequencies | The relative frequencies in the body of a two-way frequency table |

Correlation Coefficient | A measure of the strength of the linear relationship between two variables that is defined in terms of the (sample) covariance of the variables divided by their (sample) standard deviations |

Dot plot | A method of visually displaying a distribution of data values where each data value is shown as a dot or mark above a number line |

First Quartile (Q1) | The “middle value” in the lower half of the rank-ordered data |

Histogram | |

Interquartile Range | A measure of variation in a set of numerical data |

Line of best fit (trend or regression line) | A straight line that best represents the data on a scatter plot |

Mean absolute deviation | A measure of variation in a set of numerical data, computed by adding the distances between each data value and the mean, then dividing by the number of data values |

Outlier | Sometimes, distributions are characterized by extreme values that differ greatly from the other observations. OUTLIER if the values lie outside these specific ranges:if the values lie outside these specific ranges: Median – (1.5 • IQR)& Median + (1.5 • I |

Quantitative Variables | Numerical variables that represent a measurable quantity |

Residuals (error) | Represents unexplained (or residual) variation after fitting a regression model |

Scatter plot | A graph in the coordinate plane representing a set of bivariate data |

Second Quartile (Q2) | The median value in the data set |

Third quartile | For a data set with median M, the third quartile is the median of the data values greater than M |

Trend | A change (either positive, negative or constant) in data values over time |

Spread | refers to the variability of the data. If the data cluster around a single central value, the spread is smaller. The further the observations fall from the center, the greater the spread or variability of the set. |

Created by:
Deigh