Measures of Position Quiz

In a dataset of 30 values, what is the position of the 90th percentile?

• 27

• 28

• 26

• 29

Which measure of position divides a dataset into four equal parts?

• Percentiles

• Quartiles

• Deciles

• Medians

The second quartile (Q2) of a dataset is the same as the:

• Mean

• Median

• Mode

• Third quartile

If a dataset has 30 values, what is the position of the 40th percentile (P40)?

• 12.4

• 14

• 10

• 11

If Q1 = 25, Q2 = 50, and Q3 = 75, what is the interquartile range (IQR)?

• 50

• 25

• 75

• 100

Deciles divide a dataset into how many equal parts?

• 4

• 10

• 100

• 2

Which of the following is true about the 90th percentile (P90)?

• 90% of the data is below it.

• 10% of the data is below it.

• It is the same as the mean.

• It is always greater than the median.

The formula for computing a specific quartile position in a dataset of size NNN is:

• Qk=(N+1)k4

• Qk=Nk

• Qk=(N−1)k4

• Qk=(N+1)4

The percentile rank of a value in a dataset determines:

• The total number of data points.

• The position of the value in relation to others.

• The mean of the dataset.

• The sum of all values in the dataset.

If a dataset contains 50 values, what is the position of the 25th percentile (P25)?

• 10

• 13

• 11

• 12.5