Chapter 1: Q 1.29. (page 15)
In sampling, explain why obtaining a representative sample is important.
Short Answer
A representative sample is important to reflect as closely as possible the relevant attributes of the entire population under study.
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Chapter 1: Q 1.29. (page 15)
In sampling, explain why obtaining a representative sample is important.
A representative sample is important to reflect as closely as possible the relevant attributes of the entire population under study.
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In Exercises 1.7-1.12, classify each of the studies as either descriptive or inferential. Explain your answers.
Professional Athlete Salaries. From the Statistical Abstract of the United States and the article "Average Salaries in the NBA, NFL, MLB and NHL" by J. Dorish, published on the Yahoo! Contributor Network, we obtained the following data on average professional athletes' salaries for the years 2005 and 2011.

In Exercises 1.92-1.97, we present descriptions of designed experiments. In each case, identify the
(a) experimental units
(b) response variable
(c) factor (s)
(d) levels of each factor:-
(e) treatments.
The Lion's Mane. In a study by P. M. West titled "The Lion's Mane" ( American Scientist, Vol. 93, No. 3, pp. 226-236), the effects of the mane of a male lion as a signal of quality to mates and rivals was explored. Four life-sized dummies of male lions provided a tool for testing female response to the unfamiliar lions whose manes varied by length (long or short) and color (blonde or dark). The female lions were observed to see whether they approached each of the four life-sized dummies.
Baseball Scores. From ESPN MLB Scoreboard, we obtained the following major league baseball scores for August 14, 2013. Is this study descriptive or inferential? Explain your answer.

Before planning and conducting a study to obtain information, what should be done?
Top North American Athletes. Refer to Problem 17.
(a) Use systematic random sampling to obtain a sample of 15 athletes.
(b) In this case, is systematic random sampling an appropriate alternative to simple random sampling? Explain your answer.
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