BIOL 1108 Edition 1st Lecture 6 Outline of Last Lecture I Measures of Shape and Normal Distribution II Shape III Empirical Rule IV Central Limit Theorem Outline of Current Lecture I Normal Distribution II Z Distribution III Percentile Current Lecture I II III Normal Distribution Mean in the middle symmetrical 68 of values fall within 1 SD 95 of all values fall within 2 SD 99 7 of all values fall within 3 SD Most data comes within 3 SD from the mean Z Distribution Mean becomes a z score of zero Z SD value on bell curve Z X Mean SD How many SD a value is from the mean z score i score mean SD Percentile Look at z table and find z score Z score 50 percentile Ex SD 750 and Mean 4300 i Probability is more than 5000 1 Z 5000 43000 750 0 93 These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute 2 Z score 0 3238 3 50 32 38 17 62
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