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Chapter 3: Q. 3.150 (page 136)
Explain why minimum and maximum observations are added to the three quartiles to describe better the variation in a data set.
The minimum and maximum observations are added because their difference denotes the variation in data.
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A quantitative data set has mean and standard deviation .Fill in the following blanks:
(a)At least of the observation lie between ____ and____ .
(b)At least____ of the observation lie betweenand.
The Etruscans. Anthropologists are still trying to unravel the mystery of the origins of the Etruscan empire, a highly advanced Italic civilization formed around the eighth century B.C. in central Italy. Were they native to the Italian peninsula or, as many aspects of their civilization suggest, did they migrate from the East by land or sea? The maximum head breadth, in millimeters, of modern Italian male skulls and that of preserved Etruscan male skulls were analyzed to help researchers decide whether the Etruscans were native to Italy. The resulting data can be found on the WeissStats site. [SOURCE: N. Barnicot and D. Brothwell, "The Evaluation of Metrical Data in the Comparison of Ancient and Modern Bones." In Medical Biology and Etruscan Origins, G. Wolstenholme and C. O'Connor, cds., Littlc, Brown \& Co., ]
In Exercises 3.201-3.206, we have provided simple data sets for you to practice the basics of finding a
a. population mean
b. population standard deviation
3.205
We have provided simple data set for you to practices the basics of finding measures of center. For each data set determine the:
a) Mean
b)Median
c) Mode.
The given data set is.
Magazine Ads. Advertising researchers F. Shuptrine and D. McVicker wanted to determine whether there were significant differences in the readability of magazine advertisements. Thirty magazines were classified based on their educational level-high, mid, or low-and then three magazines were randomly selected from each level. From each magazine, six advertisements were randomly chosen and examined for readability. In this particular case, readability was characterized by the numbers of words, sentences, and words of three syllables or more in each ad. The researchers published their findings in the article "Readability Levels of Magazine Ads" (Journal of Adrertiving Reseanch, Vol. ). The number of words of three syllables or more in each ad are provided on the Weissstats site.
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