2011-06-13_060641_stats4.pdf - the following is a sample of 20 measurements 10 9 5,8,13 8 10 12 11 11 10 8 10 6 14 9 13 7 9 10 a compute x s2 s for this

# 2011-06-13_060641_stats4.pdf - the following is a sample of...

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the following is a sample of 20 measurements 10, 9, 5,8,13, 8, 10, 12, 11, 11, 10, 8, 10, 6, 14, 9, 13, 7, 9, 10 a. compute - x, s2, s for this sample ( the s is squared) x= type as integer or decimal s2 = round to 2 decimal places (s is squared) s = round to 2 decimal places as needed x = 9.65 s 2 = 5.40 s = 2.32 b. Count the number of measurements in the interval - x+ s, x+ 2s, x+ 3s. Express each - - - count as a percentage of the total number of measurements. (there is a - above the x's and below the +'s) The percentage of the measurements that fall within the interval - x+ s, is ___% 13 measurements are within the interval x ± s. The percentage is 13/20 * 100% = 65% The percentage of the measurements that fall within the interval - x + 2 is __% 19 measurements are within the interval x ± 2s The percentage is 19/20 * 100% = 95% The percentage of the measurements that fall within the interval _ x + 3s is ___% 20 measurements are within the interval x ± 3s The percentage is 20 / 20 * 100% = 100% c, Compare the percentages for - x + s and the percentage given by the empirical rule:  #### You've reached the end of your free preview.

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• Spring '98
• Dougs
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