Psychology 2810 Lecture Notes - Lecture 6: South Dakota Highway 10, Nxp Semiconductors, Standard Deviation

• School: Western University
• Department: Psychology
• Course: Psychology 2810
• Professor: Stephen Lupker

Document Summary

Continuous random variables can take any form (ie. decimals allowed) Probability of a and b is the area under the curve btwn a and b. You cannot talk about a cont. dis. in which x= a speci c #. only talk about intervals, not a speci c value. (ie. prob btwn a and b, but not prob of b or a alone) **whether greater or greater and equal means nothing, no dif in calculation. To answer the question, you need standard deviation (sigma) and the mean (mu). Dif sds and means give dif values. Table of z-scores at back of book**** p. 816. Simples q: p(0 < z < 1. 23)= . 3907. P(z<1. 23) = . 3907 + . 5 = . 8907. P(z>1. 23)= 1- . 8907 = . 5-. 3907 = . 1093. P(-1. 23