MM_207_Seminar_2[1] - Unit 2 Seminar Averages and Variation...

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Unformatted text preview: Unit 2 Seminar Averages and Variation MM207: Statistics LEARNING OUTCOMES Find the mode, median, and mean of a data set Find the range, standard deviation, and variance of a data set Understand how percentiles relate a data sample to the population Make a box-and-whisker plot for a data set Section 3.1 # 3 {p. 81} Upper Canyon: 2 3 1 1 3 4 6 9 3 1 3 Mean: 3.72 First, add all numbers (36). Then, divide by the amount of numbers we have (11) 36 11 3.27 Median: 3 First, put all the numbers in order. Then, find the middle number (or the average of the two middle numbers) Mode: 3 Find the number that is listed the most Section 3.2 # 5 {p. 95} x: Percentage success for mallard duck nests 56 Range: 72 Largest # - Smallest # (85 13 = 72) 85 52 13 39 Standard Deviation: 26.22 Using the 1st formula Mean: 49 (56-49)2 + (85-49)2 + (52-49)2 + (13-49)2 + (39-49)2 49 + 1296 + 9 + 1296 + 100 = 2750 2750 (5 1) = 687.5 Sqrt (687.7) = 26.22 Variance: 687.5 (26.22)2 = 687.5 Box and Whisker Plot Use the numbers below to create a box and whisker plot 31 22 5 9 5 54 5 15 9 10 10 14 3 15 14 22 5 31 54 Numbers in order: 3 Lowest Value: 3 ...
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