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This 4 page Class Notes was uploaded by Darko Stoilkovski on Sunday October 11, 2015. The Class Notes belongs to STP 231 at Arizona State University taught by in Fall 2015. Since its upload, it has received 78 views. For similar materials see Statistics for Biosciences in Statistics at Arizona State University.
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Date Created: 10/11/15
Note All of these Will have a quotAreas under the standard normal curvequot tabe given to you Reading a Standard Normal Table 0 Standard normal table provides the area to the left of zscore under a standard normal curve 0 Example area under standard normal curve to the left of 05 311 Find Area to the Left of Zscore o Avariable is normally distributed with mean 0 and standard deviation 1 a Find the area to the left of 032 under the curve 06255 b Find the area to the left of 083 under the curve 02033 c Find the area to the left of 043 under the curve 06664 d Find the area to the left of 309 under the curve 00010 0 O O 0 Find Area to the Right of Zscore o Avariable is normally distributed with mean 0 and standard deviation 1 o a Find the area to the right of 045 under the curve 03264 0 b Find the area to the right of 068 under the curve 07517 0 c Find the area to the right of 043 under the curve 03336 0 d Find the area to the right of 089 under the curve 08133 Find Area between two Zscores o Avariable is normally distributed with mean 0 and standard deviation 1 a Find the area between 085 and 035 under the curve 04391 b Find the area between 032 and 083 under the curve 01712 c Find the area between 010 and 081 under the curve 02512 d Find the area between 256 and 288 under the curve 09928 0 O O O Other Scenarios o Avariable is normally distributed with mean 0 and standard deviation 1 o a Find the area either to the left of 232 or to the right of 25 under the curve 00164 0 b Find the area either to the left of 090 or to the right of 090 under the curve 03682 Given Area find the Zscore o Za Denote the zscore that has an area of or to its right rp al 1quot i Z 0 Example 0 Avariable is normally distributed with mean 0 and standard deviation 1 o a Find Zo9192 I 14O So if you look at the table the value that corresponds with are of 09192 is actually positive 14 but that39s not the answer because you39re looking for what value makes it so that everything to the right of the line is equal to 09192 There39s two ways to do this I Find the value that is actually equal to 09192 which is 14 in this case and just change the sign so that it is now 14 Or take 09192 and subtract that from 1 The answer you get from that would be 00808 which correlates with the value of 14 on the table and that39s the answer 0 b Find Zo4247 I 019 o C Find Z00084 I 239 o d Find Z09916 I 239 Percentiles Apercentile is 0 Under a standard normal curve find 0 a 35th percentile O38 o b 40th percentile O25 o c 80th percentile 085