Question 170987: The following data represents the age (in weeks) at which babies first crawl based on survey of 12 mothers:
52, 30, 44, 35, 26, 47, 37, 56, 39, 26, 39, 28
Assume that the data comes from a normal distribution. Conduct a 95% confidence interval for the mean age at which a baby first crawls.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! The following data represents the age (in weeks) at which babies first crawl based on survey of 12 mothers:
52, 30, 44, 35, 26, 47, 37, 56, 39, 26, 39, 28
Assume that the data comes from a normal distribution. Conduct a 95% confidence interval for the mean age at which a baby first crawls.
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x-bar = 38.25
s = 10.00
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E = 1.96*10/sqrt(12) = 5.65
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95% CI:
38.25-5.65 < u < 38.25+5.65
simplify
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Cheers,
Stan H.
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