## What is the formula of quartile?

First Quartile(Q1)=((n+1)/4)th Term also known as the lower quartile. The second quartile or the 50th percentile or the Median is given as: Second Quartile(Q2)=((n+1)/2)th Term. The third Quartile of the 75th Percentile (Q3) is given as: Third Quartile(Q3)=(3(n+1)/4)th Term also known as the upper quartile.

## How do you find Q1 Q2 and Q3?

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 quantile function?**

The quantile function is defined on the unit interval (0,1). For F continuous and strictly increasing at t, then Q(u)=t iff F(t)=u. Thus, if u is a probability value, t=Q(u) is the value of t for which P(X≤t)=u.

### How do you calculate the first quartile?

First Quartile(Q1) = ((n + 1)/4)th Term. Second Quartile(Q2) = ((n + 1)/2)th Term. Third Quartile(Q3) = (3(n + 1)/4)th Term….

- quartile is also known as the lower quartile.
- quartile is the same as the median dividing data into 2 equal parts.
- quartile is also called the upper quartile.

### What is quartile math?

The quartile measures the spread of values above and below the mean by dividing the distribution into four groups. A quartile divides data into three points—a lower quartile, median, and upper quartile—to form four groups of the dataset.

**What is the quartile formula?**

The quartile measures the spread or dispersion of values that are above and below the arithmetic mean or arithmetic average by dividing the distribution into 4 major groups, which are already discussed above. This has been a guide to Quartile Formula.

#### How do you find the lower quartile of a set of data?

Data Set: First of all, you have to arrange this ascending order i.e. from lowest to highest: Number of data points is calculated as: Quartile is calculated using below given formula. Lower Quartile (Q1) = (N+1) * 1 / 4. Lower Quartile (Q1) = (19+1) * 1/4. Lower Quartile (Q1) = 20 / 4 = 5 th data point.

#### What are the four quartiles in statistics?

Once we divide the data, the four quartiles will be: 1 st quartile or lower quartile basically separate the lowest 25% of data from the highest 75%. 2 nd quartile or middle quartile also same as median it divides numbers into 2 equal parts.