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Compound Probability** |
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: ** |
The probability of the occurrence of two events. |

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Co-variance** |
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: ** |
It is the square of the standard deviations. |

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Cumulative frequency** |
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: ** |
The total frequency of all values less than or equal to the upper class boundary of a given class - interval and vice-versa. |

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Data** |
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: ** |
The numerical information collected of variables. |

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Degree of freedom** |
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: ** |
The number of classes to which the value can be assigned arbitrarily or at will without violating the restrictions and limitations placed on the numbers of independent constraints in a set of data. |

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Dependent** |
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: ** |
Events whose occurrence or non-occurence doesn't affect the occurrence of the other event. |

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Event Dependent Variable** |
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: ** |
variable which is cause or influence by another variable in a given phenomenon. |

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Descriptive Statistics** |
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: ** |
The numerical data which describes phenomena. |

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Directional Test** |
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: ** |
A test, used to compare two statistical values and predict that one is higher than the other or vice-versa. |

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Discrete Variable** |
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: ** |
A variable not capable of assuming all values in a given range or a variable which can be measured only by means of whole numbers. |

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Disjoint Occurrence** |
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: ** |
Two outcomes which doesn't happen simultaneously or which have nothing in common. |

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Distribution** |
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: ** |
Collection of measurements expressing how scores tend to spread over a measurement scale |

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Dispersion** |
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: ** |
The scatter or variability of the data about a given Central tendency. |

**
Frequency** |
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: ** |
A diagram which displays the number of measures falling into different Histogram classes. |

**
Frequency polygon** |
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: ** |
It is a graphic display in which frequencies are plotted against mid-points of the class-intervals & the points thus obtained, are join by a line segment. |

**
Fiducial limits** |
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: ** |
The confidence limits are also known as Fiducial limits [See Confidence intervals] |

**
Favorable Events ** |
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: ** |
The trials, which entail the happening of an event, are favorable to the event. |

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