Po y 3-hydroxybutyrate PHB semicrystalline polymer that is ful y biodegradable a

Question

Po y 3-hydroxybutyrate PHB semicrystalline polymer that is ful y biodegradable and biocompatible is obtained from renewable resources. From a sustainability perspective, PHB offers many attractive 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 calorimeter appeared in an artidle. HBo s many iing calermeter red in an 180.5 181.7 180.9 181.7 182.7 181.7 1813 182.1 182.1 180.3 181.6 180.6 Compute the following. (Round your answers to two decimal places.) (a) the sample range ec (b) the sample variance s2 from the definition [Hint: First subtract 180 from each observation.) 2 (c) the sample standard deviation (d) s2 using the shortcut method

Explanation / Answer

a) Range = max-min = 182.7-180.3 = 2.4

b) Sample Variance will be = 0.535

c) Sample Standard deviation will be = 0.732

d) Sample Variance will be = 0.535

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