Sample Quiz

Under which statistical measure is the quartile?

• measures of central tendency

• measures of dispersion

• measures of position

• measures of variability

Which of the following is NOT a measure of position?

• Quartiles

• Deciles

• Percentiles

• Mean

The formula for finding the position of the k-th QUARTILE in an ordered data set is:

• Qk=(k(n+1))/4

• Dk=(k(n+1))/10

• Pk=(k(n+1))/100

• M=(n+1)/2

Which measure is equivalent to fifth decile (D5)?

• Lower Quartile

• Upper Quartile

• 25th Percentile

• 50th Percentile

What method is used to find the value of a quantile if the quantile position is not a whole number?

• Rounding to the nearest whole number

• Linear interpolation

• Taking the lower-ranked value

• Using the mode of the data set

What is the first quartile (Q1) in the data set {1,2,5,9,12,15,17,20,21,22,26}?

• 2

• 5

• 15

• 21