Unit 3

Question 1

accuracy

Answer 1

The degree of closeness of measurements of a quantity to the actual (or accepted) value.

Question 2

arrowheads

Answer 2

used to indicate the end of a dimension line or leader.

Question 3

caliper

Answer 3

A measuring instrument having two adjustable jaws typically used to measure diameter or thickness.

Question 4

class interval

Answer 4

A group of values that is used to analyze the distribution of data.

Question 5

convert

Answer 5

To change money, stocks, or units in which a quantity is expressed into others of a different kind.

Question 6

data

Answer 6

Facts and statistics used for reference or analysis.

Question 7

data set

Answer 7

A group of individual values or bits of information that are related in some way or have some common characteristic or attribute.

Question 8

dimension

Answer 8

A measurable extent, such as the three principal dimensions of an object as in width, height, and depth.

Question 9

dimension lines

Answer 9

A line which represents distance.

Question 10

dot plot

Answer 10

See line plot.

Question 11

frequency

Answer 11

The rate at which something occurs over a particular period or in a given sample.

Question 12

graph

Answer 12

A diagram showing the relation between variable quantities, typically of two variables measured along a pair of lines at right angles.

Question 13

histogram

Answer 13

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

Question 14

international organization for standardization (ISO)

Answer 14

A non-governmental global organization whose principal activity is the development of technical standards through consensus.

Question 15

international system of units (SI)

Answer 15

An international system of units of measurement consisting of seven base units.

Question 16

line plot

Answer 16

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.

Question 17

mean

Answer 17

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.

Question 18

measure

Answer 18

To determine the size, amount, or degree of an objectby comparison with a standard unit.

Question 19

mode

Answer 19

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

Question 20

normal distribution

Answer 20

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

Question 21

numeric constraint

Answer 21

A number value or algebraic equation that is used to control the size or location of a geometric figure.

Question 22

precision

Answer 22

The degree to which repeated measurements show the same result.

Question 23

scale

Answer 23

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.

Question 24

scatter plot

Answer 24

A graph in the coordinate plane representing a set of bivariate data.

Question 25

significant digits

Answer 25

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

Question 26

standard deviation

Answer 26

The distance of a value in a population (or sample) from the mean value of the population (or sample).

Question 27

statistics

Answer 27

Collection of methods for planning experiments, obtaining data, organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on data.

Question 28

unit

Answer 28

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

Question 29

us customary measurement system

Answer 29

System of measurement used in the United States.

Question 30

variation

Answer 30

A change or slight difference in condition, amount, or level.

Question 31

median

Answer 31

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.