## Question

###### 1. -/0.12 points DevoreStat9 1.E.044 My Notes Ask Your Teacher Poly(3-hydroxybutyrate) (PB), a semicrystalline polymer that...

1. -/0.12 points DevoreStat9 1.E.044 My Notes Ask Your Teacher Poly(3-hydroxybutyrate) (PB), 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 1804 1813 1808 181.71827 181.7 191. 21822 1822 1802 181.6 10.5 Compute the following. (Round your answers to two decimal places.) (a) the sample range (b) the sample variances from the definition (Hint: First subtract 180 from each observation (c) the sample standard deviation (d) s using the shortcut method Need Help? Need h et

## Answers

:) Sample range = = maximum observation - minimum observation 183.7- 1802 9.5 1 (b) The new observation after Subbacting 180 azt. 0.4, 1-8, 0-8, 1-1, 2.5,17,1-2, 2:, 2:4, 6-2,46,0:6 mean [) = Ex = 1)) = [1425 Sample variance, (5²) = [ (xi - s) n-1 = (04-1425) +-- +(06-1425) 12-1 • 6-8325 $? = 10.62011K) Sample standard deviation (s) = Juariance 31.0.6202 = [0.78757 . (d). Sample variance using shortcut method. = n.[x²-(Ex)² - n(n-1) :: = 12x(394987.2) = 81.99 $3,50.800 132.... = 0.621136 = [0:62117

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