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The accompanying specific gravity values describe various wood types used in construction 0.34 0.41 0.45 0.54 0.35 0.41 0.46 0.55 0.36 0.42 0.47 0.62 0.40 0.44 0.54 0.79 0.36 0.37 0.42 0.48 0.66 0.38 0.42 0.48 0.66 0.40 0.42 0.48 0.67 0.40 0.43 0.51 0.68 0.46 0.58 Construct a stem-and-leaf display using repeated stems. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) Stemtenths Leaf hundredths 3 4 4 5 6 6 Comment on any interesting features of the display. (Select all that apply.) There is a small amount of variation in the data There is a reasonably large amount of variation in the data The display is not symmetric and appears to be positively skewed The stem-and-leaf display shows that 0.55 is a good representative value for the data The display is symmetric. The data value 0.34 is a possible outlier The data value 0.79 is a possible outlier The stem-and-leaf display shows that 0.45 is a good representative value for the dataFlexural strength is a measure of a materials ability to resist failure in bending. The accompanying data are on flexural strength of concrete (in MegaPascal, MPa, where 1 Pa (Pascal) 1.45 10-4 psi) 5.6 7.2 7.3 6.3 8.1 6.8 7.0 7.6 6.8 6.3 7.0 11.3 6.5 .9 9.0 8.2 8.7 7.8 9.7 7.4 7.7 9.77.8 7.7 11.6 11.8 10.9 (a) Construct a stem-and-leaf display of the data. (Enter numbers from smallest to largest separated by spaces. Enter NONE for stems with no values.) Stems Leaves 10 What appears to be a representative strength value? MPa Do the observations appear to be highly concentrated about the representative value or rather spread out? highly concentrated around the representative value spread out with a large range (b) Does the display appear to be reasonably symmetric about a representative value, or would you describe its shape in some other way? reasonably symmetric positive skewness negative skewness completely random distribution (c) Do there appear to be any outlying strength values? Yes No

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