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Unit 3
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Terms in this set (31)
Accuracy
The degree of closeness of measurements of a quantity to the actual (or accepted) value.
Arrowheads
Arrowheads are used to indicate the end of a dimension line or leader.
Caliper
A measuring instrument having two adjustable jaws typically used to measure diameter or thickness.
Class Interval
A group of values that is used to analyze the distribution of data.
Convert
To change money, stocks, or units in which a quantity is expressed into others of a different kind.
Data
Facts and statistics used for reference or analysis.
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 as in width, height, and depth.
Dimension Lines
A line which represents distance.
Dot Plot
See line plot.
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.
International Organization for Standardization (ISO)
A non-governmental global organization whose principal activity is the development of technical standards through consensus.
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 a number line. Also known as a dot plot.
Mean
A measure of center in a set of numerical data, computed by adding the values in a list 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. The median of a list of values is the value appearing at the center of a sorted version of the list - or the mean of the two central values if the list contains an even number of values.
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
The degree to which repeated measurements show the same result.
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.
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, organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on 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.
Variation
A change or slight difference in condition, amount, or level.
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