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# IED 1.3

### PLTW IED 1.3 Vocabulary Words and Terms to Know

Data Set A group of individual values or bits of information that are related in some way or have some common characteristic or attribute.
Dimension A measurable extent, such as the three principal dimensions of an object is width, height, and depth. Length and thickness are not used because they cannont be applied in all cases.
Dimension Lines Lines that are thin lines capped with arrowheads, which may be broken along their length to provide space for the dimension numerals.
English System Also referred to as the U.S. Customary system. The measuring system based on the foot, second, and pound as units of length, time, and weight or mass.
Extension Lines Thin lines used to establish the extent of a dimension. Extension lines begin with a short space from the object and extend to about .125 inches past the last dimension line.
Foot A unit of linear measure equal to 12 inches or 30.48 cm.
Frequency The rate at which something occurs over a particular period or in a given sample.
Graph A diagram showing the relation between variable quantities, typically of two variables measured along a pair of lines at right angles.
Histogram A graph of vertical bars representing the frequency distribution of a set of data.
Inch A unit of linear measure equal to one twelfth of a foot or 2.54 cm.
International Organization for Standardization (ISO) A non-governmental global organization whose principal activity is the development of technical standards through consensus.
Mean The average or central value of a set of quantities.
Measure To determine the size, amount, or degree of something by comparison with a standard unit.
Median Referring to the middle term or mean of the middle two terms of a series of values arranged in order of magnitude.
Meter The fundamental unit of length in the metric system, equal to 100 centimeters or approximately 39.37 inches.
Metric System The decimal measuring system based on the meter, liter, and gram as units of length, capacity, and weight or mass.
Millimeter A metric unit of linear measure equal to 1/1000 of a meter.
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 Constraint A number value, or algebraic equation that is used to control the size or location of a geometric figure.
Precision Exact in measuring, recording, etc.
Scale 1. A straight-edged strip of rigid material marked at regular intervals and used to measure distances. 2. A proportion between two sets of dimensions used in developing accurate, larger or smaller prototypes, or models of design ideas.
Standard Something considered by an authority or by general consent as a basis of comparison.
Statistics Collection of methods for planning experiments, obtaining data, organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on data.
Two-Dimensional Having the dimensions of height and width, height and depth, or width and depth only.
Unit A standard quantity in terms of which other quantities may be expressed.
Variation A change or slight difference in condition, amount, or level.
Created by: GoldenValley