How do you find the quartiles?

How do you find the quartiles?

How to Calculate Quartiles

1. Order your data set from lowest to highest values.
2. Find the median. This is the second quartile Q2.
3. At Q2 split the ordered data set into two halves.
4. The lower quartile Q1 is the median of the lower half of the data.
5. The upper quartile Q3 is the median of the upper half of the data.

How do you calculate Q1 Q2 Q3 q4?

There are four different formulas to find quartiles:

1. Formula for Lower quartile (Q1) = N + 1 multiplied by (1) divided by (4)
2. Formula for Middle quartile (Q2) = N + 1 multiplied by (2) divided by (4)
3. Formula for Upper quartile (Q3) = N + 1 multiplied by (3) divided by (4)

How do you measure Q1 and Q3?

Q1 is the median (the middle) of the lower half of the data, and Q3 is the median (the middle) of the upper half of the data. (3, 5, 7, 8, 9), | (11, 15, 16, 20, 21). Q1 = 7 and Q3 = 16.

How do you find the 2nd quartile?

Split the data into a lower half and an upper half (leaving out the median). Compute the median of the lower half and the upper half. (3 + 4)/2 = 3.5. Therefore, the second quartile (Q2) is 3.5.

How to find quartiles of 12 numbers?

There are four different formulas to find quartiles: Formula for Lower quartile (Q1) = N + 1 multiplied by (1) divided by (4) Formula for Middle quartile (Q2) = N + 1 multiplied by (2) divided by (4) Formula for Upper quartile (Q3) = N + 1 multiplied by (3) divided by (4)

How do you find the quartile of a number?

Quartiles are the values that divide a list of numbers into quarters: Put the list of numbers in order Then cut the list into four equal parts The Quartiles are at the “cuts”

How do I find the first and third quartile?

How to find the first and third quartiles. The first quartile, denoted by Q1 , is the median of the lower half of the data set. This means that about 25% of the numbers in the data set lie below Q1 and about 75% lie above Q1 .The third quartile, denoted by Q3 , is the median of the upper half of the data set.

How do you find the first and third quartiles?

Order your data set from lowest to highest values

Find the median. This is the second quartile Q 2.

At Q 2 split the ordered data set into two halves.

The lower quartile Q 1 is the median of the lower half of the data.

The upper quartile Q 3 is the median of the upper half of the data.