Q_{1}=The value for a given set of sorted values in ascending order, that is above 25% of the numbers and below 75 % of the numbers is referred to as the first quartile.

Used in:

Measures of Central Tendency.

Symbol: Q_{2} ( or Q-two)

Meaning:

It is the second quartile or the median.

Formula used:

Q_{2} = In an ordered data, it is the central value.

Used in:

Measures of Central Tendency.

Symbol: Q_{3} ( or Q-three)

Meaning:

It is the third quartile.

Formula used:

Q_{3} = The value for a given set of sorted values in ascending order, that is above 75% of the numbers and below 25 % of the numbers is referred to as the third quartile.

Used in:

Measures of Central Tendency.

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