PLTW IED - Histograms & Statistics

Histogram

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

large scale line on bar

1.000

small scale lines on bar

0.100

dial indicator

0.001

precision

The degree to which repeated measurements show the same result.

range

The set of output values of a function.

subtract biggest value from smaller value

fraction to decimal

Divide numerator by denominator

Accuracy

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

mean

average/add up all the numbers then divide by hoe MANY NUMBERS there are

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/if 2 median add together divide by 2

mode

The value that occurs most frequently in a given data set.The number that shows up the most

Statistics

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

distribution in statics

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

Variation in statics

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

central tendency statics

standard deviation

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

mm to cm

1 millimeter = 0.1 centimeter

m to km

1 meter = 0.001 kilometer

cm to dm

1 centimeter = 0.1 decimeter

in to cm

1 in = 2.54 cm

most accurate measurement

64 in

different scales 8/16/32/64

standard deviation

find mean of numbers/ numbers - mean/numbers-mean squared/add all up all the numbers from last column up /square root/round final number.No Negatives

pictorial Sketch

A sketch that shows an object's height, width, and depth in a single view.

Oblique Cabinet

Oblique pictorial where depth is represented as half scale compared to the height and width scale.

Perspective Sketch

A form of pictorial sketch in which vanishing points are used to provide the depth and distortion that is seen with the human eye.

Oblique Cavalier

Oblique pictorial sketch where height, width, and depth are represented at full scale.

two point perspective

two vanishing points

isometric sketch

A form of pictorial sketch in which all three drawing axes form equal angles of 120 degrees with the plane of projection

International System of Units

A system of units of measurements consisting of seven base units

US Customary Measurement System

System of measurement used in the United States.

convert

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

significant digits

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

dimension

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

measure

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