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. 180.4 181.7 180.9 181.7 182.5 181.5 181.4 182.1 182.1 180.4 181.6 180.6 Compute the following. (Round your answer to two decimal places.) (a) the sample range (in °C) 2.1 °C (b) the sample variance s2 from the definition [Hint: First subtract 180 from each observation.] s² = x (c) the sample standard deviation S = x (d) s2 using the shortcut method s² = X

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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.
180.4 181.7 180.9 181.7 182.5 181.5
181.4 182.1 182.1 180.4 181.6 180.6
Compute the following. (Round your answer to two decimal places.)
(a) the sample range (in °C)
2.1
°℃
(b) the sample variance s² from the definition [Hint: First subtract 180 from each observation.]
s² =
X
S =
(c) the sample standard deviation
X
(d) s² using the shortcut method
s² =
X
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Transcribed Image Text: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. 180.4 181.7 180.9 181.7 182.5 181.5 181.4 182.1 182.1 180.4 181.6 180.6 Compute the following. (Round your answer to two decimal places.) (a) the sample range (in °C) 2.1 °℃ (b) the sample variance s² from the definition [Hint: First subtract 180 from each observation.] s² = X S = (c) the sample standard deviation X (d) s² using the shortcut method s² = X Need Help? Submit Answer Read It Watch It Master It
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