CRIM 320 Lecture Notes - Lecture 3: Level Of Measurement, Central Tendency

• School: Simon Fraser University
• Department: Criminology
• Course: CRIM 320
• Professor: Christopher Giles

Document Summary

Using sample statistics to organize, present & summarize sample distributions. These statistics are based purely on the sample and describe the attributes of the sample. : no effort is made the interpret them beyond the sample. They are often referred to as point estimates. Proportion: a means of comparison of the number of cases in 1 category with the total size of a distribution. F = the number of cases in a specific category. : fa/fb a and b are both small letters. A rate is a ratio of the number of actual cases divided by the number of potential cases multiplied by a standardization coefficient. Homicide rate = (10, 000) (number of homicides/population) Rate of change = (100) (time 2f time 1f/ time 1f) Be cautious when the denominator is small! Typically you will see this used in ucr crime reports. Pie charts: used with nominal data & small number of categories.