ENTR 3P99 Lecture Notes - Interval Ratio

153 views5 pages

Document Summary

Under what minimum scale of measurements can we say that: Jim weighs 4x as much as edie? ratio. Jim and same don"t weight the same? nominal. Jim is much heavier than same, but mary is only slightly heavier than edie? interval. These types of questions will be on the tests. *nominal ordinal interval - ratio strongly. Mean cannot be calculated for nominal or ordinal scales because the intervals are not the same. People who take a 10 minute walk are twice as happy as those who don"t take a walk ratio. Your mood will change if you take a walk. I want to map the relationship between how long you walk and mood nominal interval. ) 2 (x - m will cancel each. Reflects the amount of spread that the scores exhibit around the mean. It is the square root of the variance but using n-1 as the denominator.