The accompanying summary data on CeO2 particlesizes (nm) under certain experimental
Chapter 1, Problem 12(choose chapter or problem)
The accompanying summary data on CeO2 particlesizes (nm) under certain experimental conditions wasread from a graph in the article NanoceriaEnergetics of Surfaces, Interfaces and WaterAdsorption (J. of the Amer. Ceramic Soc., 2011:39923999):3.0<3.5 3.5<4.0 4.0<4.5 4.5<5.0 5.0<5.5 5 15 27 34 225.5<6.0 6.0<6.5 6.5<7.0 7.0<7.5 7.5<8.0 14 7 2 4 1a. What proportion of the observations are less than 5?b. What proportion of the observations are at least 6?c. Construct a histogram with relative frequency onthe vertical axis and comment on interesting features.In particular, does the distribution of particlesizes appear to be reasonably symmetric orsomewhat skewed? [Note: The investigators fit alognormal distribution to the data; this is discussedin Chapter 4.]d. Construct a histogram with density on the verticalaxis and compare to the histogram in (c).
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