Measures of Position

Measures of Position

1. They're values ​​that allow the data set to be divided into equal percentage parts

2. They reflect the top, middle and bottom values

3. Common Measures of Position

   • Quartiles
     • Q1, Q2, Q3
     • Three values of the variable that divide the data set into four equal parts: the lowest quarter, two middle quarters, and a highest quarter
   • Deciles
     • D1, D2, D3, D4, D5, D6, D7, D8, D9
     • Nine deciles that divide a data set into ten equal parts: the 10th, 20th, 30th, 40th, 50th, 60th, 70th, 80th, 90th and 100th percentiles.
   • Percentiles
     • P1, P2, P3, ..., P97, P98, P99.
     • 99 percentiles divide a date set into 100 equal parts

4. To calculate the position measures it is necessary that the data are ordered from smallest to largest

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