CJUS K300 1nd Edition Lecture 9 Outline of Last Lecture I Z Score Outline of Current Lecture I Confidence Intervals pt 1 Large Samples II Central Limit Theorem Current Lecture Central Limit Theorem 1 The means from a large number of samples all of size n 100 will always form a normal distribution 2 x meaning if x 5 then 5 X Standard error of the distribution of a large number of sample means taken from the same population Confidence Interval Formula x z s n 1 Alpha levels how likely it is that you are wrong For a 99 a 01 For a 95 a 05 For 90 a 10 Example x z s n 1 Calculate a 95 confidence interval 5 5 1 96 2 5 100 1 5 5 49 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 We are 95 confident that the actual population mean attitude toward gun control is between 5 01 points and 5 99 points on the Gun Control Attitude Scale
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