# LING 4P20 Lecture Notes - Lecture 3: South Dakota Highway 15, South Dakota Highway 10, Standard Score

## Document Summary

Slp administers the brock receptive vocabulary test to 11 year old girl. Natalie obtains a score of 18 on brvt. Assume mean = 100, sd = 15; than 68% of scores between 85 and 115. Assume mean = 50, sd= 10; than 68% of scores between 40 & 60. Knowing how scores are distributed allows comparisons among individual scores. Examine how far away individual score is from mean in sd units. Describe normal distribution with z= mean = 0 sd = 1. When original distribution has mean of 100 and sd of 15. To compare individual"s score on test to normal (the referenced or standard) Refers typically to range of scores that are centred on mean score. Data obtained by participants in standardization (or normative) sample) What do we know about this distribution. Graph represents # of people with scores at each score value. Need to know both mean (x-bar) and standard deviation (sd) (measure of.