In: Statistics and Probability
The table provides summary statistics on highway fuel economy of cars manufactured in 2012 (from Exercise 5.32). Use these statistics to calculate a 98% confidence interval for the difference between average highway mileage of manual and automatic cars, and interpret this interval in the context of the data.
Hwy MPG, Automatic | Hwy MPG, Manual | |
---|---|---|
Mean | 22.92 | 27.88 |
SD | 5.29 | 5.01 |
n | 26 | 26 |
lower bound: mpg (please round to two decimal
places)
upper bound: mpg (please round to two decimal
places)