User's Manual

BrailleNote Apex QT User Guide
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8.4.10 Definitions of Statistical Terms.
As you probably know, Statistics is a mathematical science pertaining to collection, analysis,
interpretation and presentation of data.
Below are the terms that you will need to be familiar with in order to effectively use the statistics
function of KeySoft.
VALUE: A value is a number that is a measurable amount or quantity. In statistics, a set of values is
what makes up a data set.
FREQUENCY: The frequency is the number of times a value occurs and is represented by the letter
N.
DATA ITEM: A data item is made up of a "value" and a "frequency".
DATA SET as represented by the symbols left set or opening curly brace, a group of numbers with
commas in between them and right set or closing curly brace to close the set, that is {,,,}: The
section of a population which is observed.
For example, the number of goals scored in a hockey tournament is represented by the following
data set:
{0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 5, 5, 5}
We can represent the above data set as follows:
Number of goals = 0; Frequency = 4
Number of goals = 1; Frequency = 3
Number of goals = 2; Frequency = 4
Number of goals = 3; Frequency = 5
Number of goals = 4; Frequency = 3
Number of goals =5; Frequency = 3
It is often faster to enter a data set into the calculator by entering the value and frequency together.
For example, rather than typing the value of 0 four times, we can type the value of 0 followed by a
frequency separator, followed by the frequency.
Once the above data is entered into the calculator, we can access the statistical functions menu to
find out the average score, the most common score, how many games were played, etc.
MAXIMUM: The maximum is the highest value in the data set.