A 90% confidence interval for the mean time it takes to run 1 mile for all high school track athletes is computed from a simple random sample of 200 track athletes and is found to be 6.2± 0.8 minutes. We may conclude that:
A. there is a 90% probability that the true mean is 6.2 minutes and a 90% chance the margin of error is 0.8.
B. 90% of the sample mean run times will fall between 5.4 to 7.0 minutes
C. there is a 90% probability the true mean run time is captured in the interval from 5.4 to 7.0 minutes
D. if we took many, many random samples of the same size and computed their confidence intervals, approximately 90% of the intervals will capture the true mean running time.
