The document discusses measures of position for ungrouped data including quartiles, deciles, and percentiles. It specifically describes quartiles, which divide a distribution into four equal parts (Q1, Q2, Q3). The Mendenhall and Sincich method is presented for finding quartile values using a formula based on the number of data points. The method involves arranging data in order and determining the quartile positions. Linear interpolation is described for estimating quartile values that fall between data points. An example applies these methods to calculate quartiles for a set of student test scores.