Question: Crawling. Data collected by child development scientists produced this confidence interval for the average age (in weeks) at which babies begin to crawl:
t-Inter val for μ
(95.00% Confidence): 29.202 < μ(age) < 31.844
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.