statistics
posted by kathy .
A biologist reports a confidence interval of (3, 2, 3, 8) when estimating the mean height in (in centimeters) of a sample of seedlings. The estimated margin of error is __________ , The sample mean is ________.

Add the two values together, then divide by 2 to get the mean:
3.2 + 3.8 = 7.0
Divide 7.0 by 2 = 3.5 = mean
Margin of error = .3
3.5  .3 = 3.2
3.5 + .3 = 3.8
I hope this will help you with other problems of this type.