As part of the 2000 census, the Census Bureau surveyed 700,000 households to study transportation to work.
Question:
a. With such a large survey, explain why the margin of error for any of these values is extremely small.
b. The survey also reported that the mean travel time to work was 24.3 minutes, compared to 22.4 minutes in 1990. Explain why this is not sufficient information to construct a confidence interval for the population mean. What else would you need?
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Related Book For
Statistics The Art And Science Of Learning From Data
ISBN: 9780321755940
3rd Edition
Authors: Alan Agresti, Christine A. Franklin
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