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www.webassign net/web/Student Assignment Responses/submitdep-18222604.07 o 3.12/12.5 points | Previous Answers DevoreStat9 1 E 044 Poly(3-hydroxybutyrate) (PHB), a semicrystalline polymer that is fully biodegradable and biocompatible, is obtained from renewable resources. From a sustainability perspective, PHB offers ma properties though it is more expensive to produce than standard plastics. The accompanying data on melting point (°C) for each of 12 specimens of the polymer using a differential scanning ca in an article 180.5 181.8 180.8 181.7 182.5 181 181.4 182.1 182.2 1804 181.6 1s0 5 Compute the following. (Round your answers to two decimal places. (a) the sample range lec (b) the sample variance s? from the definition [Hint: First subtract 180 from each observation) (c) the sample standard deviation (d) s2 using the shortcut method Need ttelp? Read I Talk to a Tutor

Explanation / Answer

S^2= 29.7/12= 2.475= 2.47

S= SQRT(2.47)= 1.57

S^2= 0.47

(YOU HAVEN'T MENTIONED SHORTCUT METHOD HERE)

SO I USED HERE EXCEL TO GET S^2= 0.47

Xi (Xi-180) (Xi-180)^2 180.5 0.5 0.25 181.8 1.8 3.24 180.8 0.8 0.64 181.7 1.7 2.89 182.5 2.5 6.25 181.5 1.5 2.25 181.4 1.4 1.96 182.1 2.1 4.41 182.2 2.2 4.84 180.4 0.4 0.16 181.6 1.6 2.56 180.5 0.5 0.25 TOTAL 29.7

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