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### 8 Cards in this Set

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 Properties of Standard Normal Distribution 1.Bell Shaped 2.Symmetric around 0 (i.e mu=0) 3.Std.dev or sigma=1 always 4.Total area is 1 or 100% 5.Values are denoted by z's or z-score 6.Has table with area under the curve to the left of a z-score Other imp points 1.68-95-99.7 rule only gives us area within 3 std.dev of mean but the Std.Norm table gives us an unlimited amount of values. 2.Purpose:use table to find area under any normal curve 3.area under curve=proportion(probability) of observations under the curve. POINT Table enntry for z is the area under the std.normal curve to the left of z. Table Components 1.The left column has ones and tenTHS digits of the -score 2. The heading at the top has hundreTHS digits of z score 3. Area (probability) left of a z-score is in the body of the table Two ways to use Std.Normal Table Use 1: Given z find area Use 2: Given area find z Three Types of find area problems 1.Area to left of z 2. Area to the right of z 3.Area b/w to z's If z score is three of more decimal places If so then we either round or we then use a calculator or a software package Point Z scores tell % of values under the curve and u can find that by multiplying by 100 a z-score.