Xander Deciles and percentiles of ungrouped data

A technique that divide a set of data into ten equal parts.

• Quartile

• Decile

• Percentile

A technique that divide a set of data into one hundred equal parts.

• Quartile

• Decile

• Percentile

 $Q_1$ is always equal to  $P_3$   

• True

• False

Second quartile, fifth decile and fiftieth percentile have the same value

• True

• False

A company manufactures computer terminals. The following data give the number of computer terminals produced at the company for a sample of 5 days. What is the eighth decile? 23 24 27 32 33

• 24

• 27

• 32

• 33

The median is equivalent to...

• the middle quartile (Q₂)
• the fifth decile (D₅)
• the 50th percentile (P₅₀)
• all of these

Jenny scored at the 99th percentile on a test. How should we interpret this information?

• Jenny scored better than 99% of people who took this test

• Jenny scored worse than 99% of people who took this test

• Jenny got 99% of the questions on the test right

• Jenny got 99% of questions on the test wrong

Anna and her brother are both 62 inches tall. Anna is in the 85th percentile for height for her age and her little brother is in the 90th percentile. Who is taller for their age?

• They're the same, both 62 inches.
• Anna, she's taller than more people. 
• Brother, he's taller than more people. 
• You can't tell if you don't know the mean and standard deviation. 

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