Crawling Data collected by child development scientists produced this confidence
Chapter 22, Problem 12(choose chapter or problem)
Crawling Data collected by child development scientists produced this confidence interval for the average age (in weeks) at which babies begin to crawl: t-Interval for m 29.202 6 m1age2 6 31.844 (95.00% Confidence): a) Explain carefully what the software output means. b) What is the margin of error for this interval? c) If the researcher had calculated a 90% confidence interval, would the margin of error be larger or smaller? Explain.
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