Quartiles, Deciles, and Percentiles

What measures of position divides the distribution into 100 equal parts?

• quartiles
• deciles
• percentiles
• range

What measures of position divides the distribution into 10 equal parts?

• quartiles
• deciles
• percentiles
• range

What measures of position divides the distribution into 4 equal parts?

• quartiles
• deciles
• percentiles
• range

How many percent corresponds P₂₅ if you will interpret it?

• 10%
• 25%
• 50%
• 60%

How many percent corresponds Q3 if you will interpret it?

• 25%
• 50%
• 75%
• 90%

How many percent corresponds D6 if you will interpret it?

• 20%
• 40%
• 60%
• 80%

The Median is also referred to as

• the 25th Percentile

• the 50th Percentile

• the 75th Percentile

• the 100th Percentile

If I tell you that you scored at the 55th percentile on your final exam, you would know:

• 55% of the class scored the same or worse than you did

• You earned a 55% on the exam

• You failed the exam

• 45% of the class scored worse than you did

Given the data set: 1, 2, 3, 6, 9, 11, 45, 102, calculate the percentile rank for 11.

• 70^th percentile

• 62.5^th percentile

• 72.5^th percentile

• 68.75^th percentile

In this set of scores: 4, 2, 3, and 1, what is the first quartile of the data set using interpolation?

• 1

• 1.25

• 1.5

• 1.75