Lesson 1.3 Key Terms

American National Standards Institute (ANSI): a private nonprofit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States; organization also coordinates U.S. standards with international standards so that American products can be used worldwide.

Accuracy: the condition or quality of being true, correct, or exact; freedom from error or defect; precision or exactness; correctness.

Caliper: a device used to measure the distance between two symmetrically opposing sides.

Class Interval: one of a set of intervals of arbitrary width into which the range of a sample of measurement is partitioned.

Convert: to change (something) into a different form or properties; transmute; transform.

Data: individual facts, statistics, or items of information

Data Set: a collection of data records for computer processing.

Dimension: measurement in length, width, and thickness.

Dimension Lines:

English System: creative way that people measured for themselves. 

Extension Lines: thin lines that extend from the object outline or point on the object to a place outside the image area.

Foot: a unit of length, originally derived from the length of the human foot. It is divided into 12 inches and equal to 30.48 centimeters.

Frequency: The property or condition of occurring at frequent intervals.

Graph: a diagram representing a system of connections or interrelations among two or more things by a number of distinctive dots, lines, bars, etc.

Histogram:a bar chart representing a frequency distribution; heights of the bars represent observed frequencies.

Inch: a unit of length, 1/12 foot, equivalent to 2.54 centimeters.

International Organization for Standardization (ISO):A voluntary, nontreaty organisation founded in 1946, responsible for creating international standards in many areas, including computers and communications. Its members are the national standards organisations of 89 countries, including the American National Standards Institute.

Mean:

Measure:

Median:

Meter:

Metric System:

Millimeter:

Mode:

Normal Distribution:

Numeric Constraint:

Precision:

Scale:

Standard:

Statistics:

Two-Dimensional:

Unit:

Variation: