Data Measurement Tools

Question 1

Also known as the 50th percentile, is the middle value in a range of values.

Answer 1

Median

Question 2

The most frequently occurring value in a set of data.

Answer 2

Mode

Question 3

The average score or value.

Answer 3

Mean

Question 4

Also known as raw average, is the sum of all the values in the sample divided by the number of values.

Answer 4

Unweighted mean

Question 5

Also known as the weighted average, is used when some data in the dataset have more significance or effect than other data.

Answer 5

Weighted mean

Question 6

Used to sort data into groups according to some factor, such as years of employment. This allows analysts to understand the distribution of the data they are working with - whether the data is focused in a normal pattern around a central value or is more broadly or narrowly dispersed over the data range.

Answer 6

Frequency Distributions

Question 7

Divide a data set into quarters

Answer 7

Quartile

Question 8

Indicates the proportion of the dataset at a certain percentage.

Answer 8

Percentile

Question 9

Represents the distance of any data point from the center of a distribution when data is distributed in a “normal” or expected pattern.

Answer 9

Standard deviation