Interpreting a Confidence Interval for a Mean
The table below provides summary statistics for the gas mileage of a sample of 10 cars. Using these data, a 95% confidence interval for the true mean gas mileage was calculated to be . Which of the following statements is a correct interpretation of this interval?
| Sample Size | Mean MPG | Standard Deviation (mpg) |
|---|---|---|
| 10 | 27.2 | 1.8 |
A
We are 95% confident that the true mean gas mileage of all new model cars lies between and miles per gallon.
B
There is a 95% chance that the observed sample mean falls between and mpg.
C
There is a 95% probability that in repeated sampling, 95% of the individual cars will have a mileage between and mpg.
D
Exactly 95% of all cars in the population are expected to have a gas mileage within the interval to mpg.
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