The accompanying summary data on CeO2 particle sizes (nm) under certain experimental conditions was read from a graph in an article. 3.0– 3.5– 4.0– 4.5– 5.0– 5 16 27 34 23 5.5– 6.0– 6.5– 7.0– 7.5– 15 8 3 3 1 (a) What proportion of the observations are less than 5? (Round your answer to three decimal places.) Answer:____________ (b) What proportion of the observations are at least 6? (Round your answer to three decimal places.) Answer:_____________ (c) Construct a histogram with relative frequency on the vertical axis. Answer:_____________ Comment on interesting features. In particular, does the distribution of particle sizes appear to be reasonably symmetric or somewhat skewed? [Note: The investigators fit a lognormal distribution to the data.] ____positively skewed ____negatively skewed ____symmetric

The accompanying summary data on CeO 2 particle sizes (nm) under certain experimental conditions was read from a graph in an article. 3.0–

The accompanying summary data on CeO₂ particle sizes (nm) under certain experimental conditions was read from a graph in an article.

3.0–<>	3.5–<>	4.0–<>	4.5–<>	5.0–<>
5	16	27	34	23
5.5–<>	6.0–<>	6.5–<>	7.0–<>	7.5–<>
15	8	3	3	1

(a) What proportion of the observations are less than 5? (Round your answer to three decimal places.)

Answer:____________

(b) What proportion of the observations are at least 6? (Round your answer to three decimal places.)

Answer:_____________

Comment on interesting features. In particular, does the distribution of particle sizes appear to be reasonably symmetric or somewhat skewed? [Note: The investigators fit a lognormal distribution to the data.]

____positively skewed

____negatively skewed

____symmetric

Jun 10, 2022

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The accompanying summary data on CeO 2 particle sizes (nm) under certain experimental conditions was read from a graph in an article. 3.0–

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