MAT 121 Lecture 11: Area and Probability of Density Curves
3 Nov 2014
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Mat 121: elementary statistics and probability- lecture 11: area and probability of. *same as nding the area of the shaded region* Using the table in your textbook (table a-2: negative and positive z-scores) Using the table, nd the intersection of row 2. 3 and column . 07. Using the table, nd the intersection of row 1. 8 and column . 02. *note that this is the left area, so you must subtract . 9656 from 1* Area between a&b: to nd the area between two positive z-scores, nd the area to the left of each of them and then subtract the smaller area from the larger area. Find the left area of the left area to p(z-scores < . 75) Find the area left to p(z-scores < . 21) Find the z-scores when probabilities are given: area to the left is given, locate the closest values of it in the body of table a-2 and identify the corresponding z-scores.
