Exam 11: Quantiles and the Quartile Deviation

Data for weekly sales total in a Dubai firm are analysed to give the following quartiles: Q₁ = AED 45,000; Q₂ = AED 52,500; Q₃ = 63,780. Which of the following options represents the correct interpretation of the quartile measure of skewness (qsk) for these figures?

Calculate the quartile coefficient of dispersion for data with a quartile deviation of 40 and a median of 95 (1 decimal place).

When splitting a set up into quartiles, what name is given to the value that separates the highest from the second-highest quartile?

New car sales values for March 2014 show that the lower quartile is £11,750, the median value is £16,360 and the upper quartile is £26,253. What is the value of the quartile distribution?

Using the quartile coefficient of dispersion, compare the information about petrol prices in Australia and Japan to see which has greater variance.

Quantiles split data into parts that are…?

Which statement about deciles is NOT true?

Calculate the upper quartile for the following data set:

Which statement about calculating quartiles is NOT true?

Identify the lower quartile in this data set: 16, 24, 19, 10, 13, 19, 20