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Grouped Data** |
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: ** |
A set of values belonging to different groups. |

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Histogram** |
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: ** |
Graphic display of the frequency of a phenomenon. |

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Independent Variable** |
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: ** |
A variable that causes or influences another variable. |

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Independent Event** |
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: ** |
An event, whose occurrence or non-occurence, doesn't effect the occurrence of the other event in any way. |

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Inference** |
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: ** |
Conclusion about a population parameter based upon the analysis of a sample statistic (sample being drawn from same population). |

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Inter-Quartile Range** |
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: ** |
It is the difference between the upper (Q3) and the lower quartile (Q1) inclusive. |

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Interval** |
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: ** |
A scale, which uses numbers to rank order. |

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Intercept** |
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: ** |
The value of the ordinate (Y) at which a straight line crosses the vertical axis. |

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Joint Occurrence** |
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: ** |
An occurrence in which two outcomes happen simultaneously (ABor A Ç B). |

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Kurtosis** |
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: ** |
It is the degree of flatness or peakedness, in the region of the mode of frequency curve. |

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Large sample** |
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: ** |
A sample whose size is above 30. |

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Least squares** |
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: ** |
Any line or curve fitting model, that minimizes the squared distance of the data points to the line. |

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Leptokurtic** |
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: ** |
If the curve is more peaked than the normal curve it is called Leptokurtic. |

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Lower Quartile (Q**_{1}) |
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: ** |
It is the size of the 25th observation when the data is arranged in ascending or descending order or the 25th percentile of a set of measures. |

**
Lines of Regression** |
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: ** |
In the scatter plot, if the variables are highly correlated then the dots lie in a narrow strip. If the strip is nearly a straight line then it is called a line of regression. |

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Level of Significance** |
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: ** |
The probability level below which we reject the hypothesis. |

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Mean** |
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: ** |
It is the some of the measures in a distribution by their number. |