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# IED_Key_Terms_U-3

### IED_Key_Terms_Unit3

Term | Definition |
---|---|

Accuracy | The degree of closeness of measurements to the actual |

Arrowheads | Used to indicate the end of a dimension line |

Caliper | A measuring instrument with two adjustable jaws |

Class Interval | A group of values that is used to analyze |

Convert | To change money, or units which a quantity is expressed into another kind |

Data | Facts, statistics used for reference |

Data Set | A group of individual values or bits of information |

Dimension | A measurable extent, such as the three principal dimensions of an object |

Dimension line | A line which represents distance |

Dot Plot | See line plot |

Frequency | the rate at which something occurs over a particular period |

Graph | A diagram showing the relation between variable quantities, typically of two variables |

Histogram | A graph of vertical bars representing the frequency distribution of a set of data |

International Organization for Standardization (ISO) | A non-governmental global organization whose principal activity is the development of technical standards. |

International System of Units (SI) | An international system of units of measurement consisting of seven base units |

Line Plot | A method of visually displaying a distribution of data values where each data value is shown as a dot or mark above the number line. |

Mean | A measure of center in a set of numerical data computed by adding the values and then dividing by the number of values in the list. |

Measure | To determine the size, amount, or degree of an object by comparison with a standard unit. |

Median | A measure of center in a set of numerical data. Is at the center of a list. |

Mode | The value that occurs most frequently in a given data set. |

Normal Distribution | A function that represents the distribution of variables as a symmetrical bell-shaped graph. |

Numeric Constant | A number value or algebraic equation on that is used to control the size or location of a geometric figure |

Precision | The degree to which repeated measurements show the same result |

Scale | A straight-edged strip of rigid material marked at regular intervals and used to measure distances |

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

Significant Digits | The digits in a decimal number that carry meaning contributing to the precision or accuracy of the quantity |

Standard Deviation | the distance of a value in a population (or sample) from the mean value of the population (or sample) |

Statistics | Collection of methods for planning experiments, obtaining data |

Unit | A standard quantity in terms of which other quantities may be expressed. |

US Customary Measurement System | System of measurement used in the United States |

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