A 90% confidence interval for the average height of trees is (45, 55) feet. Which is the BEST interpretation?

We are 90% confident the population mean height is between 45 and 55 feet. A confidence interval describes confidence about the population mean, not individuals.

90% of trees are between 45 and 55 feet tall.

The interval is the maximum possible range.

We are 90% confident the population mean height is between 45 and 55 feet.

There is a 10% chance the true mean is exactly 50 feet.

Inference from Sample Statistics and Margin of Error

SAT Math· difficulty 4/5

(45, 55)

A
$90% of trees are between 45 and 55 feet tall.$
B
$The interval is the maximum possible range.$
C
$We are 90% confident the population mean height is between 45 and 55 feet.$
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D
$There is a 10% chance the true mean is exactly 50 feet.$

Explanation

A confidence interval describes confidence about the population mean, not individuals.

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