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664 HW1 Solns

# 664 HW1 Solns - Moments Mean 89.475556 Std Dev 4.1577682 N...

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Statistics 664 Homework 1 – Solutions 3.7 Here is the histogram from Minitab 98 96 94 92 90 88 86 84 9 8 7 6 5 4 3 2 1 0 Yield Frequency Histogram of Yield Here is the histogram JMP A histogram from either package is acceptable.

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3.17 Time series plot from Minitab 90 81 72 63 54 45 36 27 18 9 1 100 95 90 85 Index Yield Time Series Plot of Yield Time series plot from JMP Time Series Yield Either plot is acceptable. Generally, yield fluctuates around 89.5. All values are within 10 of 89 with no outliers. There do not appear to be any long term trends
3.19 Output from Minitab Descriptive Statistics: Yield Variable N Mean StDev Yield 90 89.476 4.158 Output from JMP

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Unformatted text preview: Moments Mean 89.475556 Std Dev 4.1577682 N 90 Both are acceptable. 3.20 Stem and Leaf Plot from Minitab (Modified to show only stem and leaf) Stem-and-Leaf Display: Yield Stem-and-leaf of Yield N = 90 Leaf Unit = 0.10 Stem Leaf 82 69 83 0167 84 01112569 85 011144 86 1114444667 87 33335667 88 22368 89 114667 90 0011345666 91 1247 92 144 93 11227 94 11133467 95 1236 96 1348 97 38 98 Stem and Leaf plot from JMP Stem and Leaf Either plot is acceptable. A stem-and-leaf plot provides more information than the histogram because it provides the actual values....
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