Quartile, Decile and Percentile

It divides a data set into four equal parts.

• Quantile

• Quartile

• Decile

• Percentile

It divides the data set into one hundred equal parts.

• Decile

• Median
• Quartile

• Percentile

It divides the data set into ten equal parts.

• Deciles
• Medians
• Percentiles
• Quartiles

What is the formula for finding Q1?

• Q1 = Median of the lower half of the data
• Q1 = Maximum value of the data
• Q1 = Mean of the data
• Q1 = Mode of the data

What is decile formula?

• Decile = (n + 1) x d / 100

• Decile = (n + 1) x d / 4

• Decile = (n + 1) x d / 10

• Decile = (n + 1) x d / 20

Find the 50th percentile.

Find the tenth decile.

Find the 60th percentile.

The following are the test scores of 12 students in a statistics class:

70, 77, 65, 56, 62, 73, 85, 87, 92, 82. Find the value of 80th percentile?

The following are the test scores of 10 students in a statistics class:

70, 77, 65, 56, 62, 73, 85, 87, 92, 82. Find the 1st decile.

• 56

• 65

• 70

• 62