Chapter 3: Q. 3.106 (page 122)
What is another name for the Empirical rule? Why is that name appropriate?
Empirical rule is also referred as three-sigma rule.
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Find the
a. Mean b. median c. models
For the mean and the median, round each answer to one more decimal place than that used for the observations.
Hurricanes. An article by D. Schaefer et al. reported on a long-term study of the effects of hurricanes on tropical streams of the Luquillo Experinental Forest in Puerto Rico. The study shows that Hurricane Hugo had a significant impact on stream water chemistry. The following table shows a sample of ammonia fluxes in the first year after Hugo. Data are in kilograms per hectare per year.
Find the
a. Mean b. median c. models
For the mean and the median, round each answer to one more decimal place than that used for the observations.
Amphibian Embryos. In a study of the effects of radiation on amphibian embryos titled "Shedding Light on Ultraviolet Radiation and Amphibian Embryos" L. Licht recorded the time it took for a sample of seven different species of frogs' and toads' eggs to hatch. The following table shows the times to hatch, in days.
Fill in the blanks: Roughly, when arranged in increasing order, the uppermost of the dataset are greater than or equal to _______ .
What does Chebyshev's rule say about the percentage of observations that lie within one standard deviation to either side of the mean? Discuss your answer.
The Beatles. In the article. "Length of The Beatles' Songs",(Chance Vol. . No. , pp. ). T. Koyama discusses aspects and interpretations of the lengths of songs by The Beatles. Data on the length, in seconds, of Beatles' songs are presented on the Weiss Stats site.
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