The relationship between the lingual position of the mandibular molar roots and the floor of the mouth

Data is collected in three age groups, and in each age group the type of molar (1st, 2nd, and 3rd molar). The data is further divided into male and female under each molar type, and into for each subject into left and right. Then the data for intra- and inter-observer errors is also included. Datasets are in MicroSoft Excel Spreadsheet format.