SOLUTION: A study reports that the mean birth weight of 81 full-term infants is 6.1 pounds. The study also reports �SE= 0.22 pounds� What is the margin of error of this estimate for 95% conf

Question 1019034: A study reports that the mean birth weight of 81 full-term infants is 6.1 pounds. The study also reports �SE= 0.22 pounds� What is the margin of error of this estimate for 95% confidence? Please explain.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Standard error is a measurement of difference between the sample mean and the true mean.
Margin of error is a measure of the spread of the data normalized to a normal distribution.
Margin of error is the product of the standard error and the critical z value.
For 95% it's 1.96.
So,

So the 95% confidence interval is,
(,)
(,) <--- Rounded because the mean only has one significant digit.
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