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DBA 8100 Business Administration

tag 0 Download 3 Pages / 547 Words tag 01-03-2021

Questions:

1. Measures of Average: U.S. Census Bureau
The U.S. Census Bureau reports the median family income in its summary of census data.
a) Why do you suppose it uses the median instead of the mean?
b) What might be the disadvantages of reporting the mean?
2. Measures of Variation: MP3 Player Life Span
A company selling a new MP3 player advertises that the player has a mean lifetime of 5 years. If you were in charge of quality control at the factory, would you prefer that the standard deviation of lifespans of the players you produce be 2 years or 2 months? Why?
3. Correlation: Height and Reading
A researcher studies children in elementary school and finds a strong positive linear association between height and reading scores.
a) Does this mean that taller children are generally better readers?
b) What might explain the strong correlation?
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