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Statistics help?
Based on a sample of 100 dogwood trees a 90% confidence interval for the height of dogwood trees is found to be 16.5 feet to 23.5 feet.
1. What is the mean height for this sample of dogwood trees?
2. What is the margin of error for this confidence interval?
1 Answer
- AlanLv 72 weeks agoFavorite Answer
the mean is in the center of the confidence interval
1.(16.5 + 23.5) /2 = 20 mean = 20
2.
Margin of error is distance from the mean of the confidence
interval
23.5 -20 = 3.5
16.5 -20 =-3.5
Margin of error = 3.5
or +/- 3.5 feet if you like this better
