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Poly(3-hydroxybutyrate) (PHB), a semicrystalline polymer that is fully biodegradable and biocompatible, is obtained from renewable resources....

Poly(3-hydroxybutyrate) (PHB), a semicrystalline polymer that is fully 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 article.

180.6 181.8 180.9 181.7 182.6 181.5
181.3 182.1 182.1 180.4 181.8

180.6

b) the sample variance s2 from the definition [Hint: First subtract 180 from each observation.]

c)the sample standard deviation

d)s2 using the shortcut method

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Expert Solution

TOPIC:Sample variance and sd.

milcah answered 1 year ago
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