Statistics Test 1

Front 1

Independent Variable

Back 1

Something that causes change

Front 2

Dependent Variable

Back 2

Something that changes because of the Independent Variable

Front 3

Population

Back 3

The complete collection of all elements being studied

Front 4

Sample

Back 4

Subcollection of members selected from a population

Front 5

Parameter

Back 5

Numerical measurements describing some characteristics of the population

Front 6

Statistic

Back 6

Numerical measurement describing some characteristic of the sample

Front 7

Nominal Level of Measurement

Back 7

Data that consist of names, label, categories only.

Ex: Yes, no, undecided..... colors

Front 8

Interval Level of Measurement

Back 8

Names, labels, but difference between two categories is meaningful. No natural starting point

Ex: Temperature, Years

Front 9

Ratio Level of Measurement

Back 9

Meaningful difference, natural zero starting point

Ex: weights, prices

Front 10

Ordinal Level of Measurement

Back 10

Can be arranged in some order, but differences are meaningless (cannot be subtracted from each other0

EX: Grades, ranks

Front 11

Lower class limits

Back 11

Smallest numbers that can belong to each class (sample results)

Front 12

Upper class limits

Back 12

Largest numbers that can belong to each class (sample results)

Front 13

Class Boundaries

Back 13

Size of the gap between Upper Limit of one class and Lower Limit of the next. Add 1/2 that to each Upper Limit to find Upper Class Boundaries. Subtract 1/2 that to find Lower Class Boundaries.

Front 14

Class Midpoints

Back 14

Add Lower class limits to Upper class limits and divide by 2.

Front 15

Class width

Back 15

Difference between 2 consecutive Lower class limits or Upper class limits.

Front 16

Median

Back 16

Data values arranged in order, then find middle. If even number of values, median is the mean of both middle numbers

Front 17

Mode

Back 17

Most often repeated

Front 18

Midrange

Back 18

Add highest to lowest and divide by 2.

Front 19

Range

Back 19

Distance between highest and lowest number

Front 20

Standard Deviation

Back 20

Measure of variation of values about the mean