The document discusses different measures of position that are used to divide a data distribution, including quartiles, deciles, and percentiles. Quartiles divide a distribution into four equal parts, with the first quartile being the point where 25% of values fall below. Deciles divide the distribution into ten equal groups and percentiles divide it into 100 equal groups. Measures of position are techniques used to split a data set into portions to help characterize the values within it.