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Math 246 Project 1 Sample KEY

Math 246 Project 1 Sample KEY - Project One Sample-KEY An...

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Project One Sample ---KEY: An investigator is interested in examining the effects of alcohol on individual's ability to perform physical activities. Twenty randomly selected individuals consumed a prescribed amount of alcohol, and their time to complete a specific physical activity was recorded. Describe the data. HINT: Use MINITAB (include a copy of the output); you might want to investigate whether or not there is symmetry: Write a short but detailed summary of the shape, center, spread, and outlier, etc, using the various graphical and numerical techniques discussed in chapters 1,2,3. Times: 12.5 14 16.1 27.2 14.5 22.6 15.9 16.2 10.1 29.1 12.5 12.6 9.9 12.8 11.1 23.2 14.5 32.6 16.9 9 Descriptive Statistics: TIME Variable N Mean StDev Minimum Q1 Median Q3 Maximum Range IQR TIME 20 16.66 6.73 9.00 12.50 14.50 21.18 32.60 23.60 8.68 N for Variable Mode Mode TIME 12.5, 14.5 2 Stem-and-Leaf Display: TIME Stem-and-leaf of TIME N = 20 Leaf Unit = 1.0 2 0 99 4 1 01 8 1 2222 (4) 1 4445 8 1 666 5 1 5 2 5 2 23 3 2 3 2 7 2 2 9 1 3 1 3 2
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30 25 20 15 10 6 5 4 3 2 1 0 TIME Fr e q u e n c y Histogram of TI ME 35 30 25 20 15 10 TIME Boxplot of TI ME
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