IE 3302 Chapter : Ch 1 Powerpoint
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Statistics terms (cid:149) variation: (cid:149) sample: (cid:149) probability: (cid:149) 2 types of data. Inferential (cid:149) presentation and summarization of data (cid:149) simple statistics (cid:149) examples: (cid:149) draw conclusions about data (cid:149) determine cause and effect (cid:149) make decisions (cid:149) examples: Summary (cid:149) statistics are useful in everyday life and engineering, regardless of discipline (cid:149) statistics help us make decisions when there is variability in data (cid:149) important terms: Chapter 1, part 2 objectives (cid:149) basic descriptive statistics: mean, median, standard deviation, variance (cid:149) graphical methods of displaying data. Frequency distribution histogram (cid:149) interpreting descriptive statistics. Where is the center of the sample data? n i. Where xi is each data point and n is the total sample size n. To find: order all data from least to greatest, count n, use appropriate equation. Standard deviation (cid:149) average distance from the mean (cid:149) spread of the data s. Variance (cid:149) average squared deviation (distance) from the mean.
