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 90% confidence interval means the method used to create the interval captures the true population mean in about 90% of repeated random samples of the same size. Here, the calculated interval is 6.2 ± 0.8, or 5.4 to 7.0 minutes. The true mean is fixed, so we do not say there is a 90% probability that this particular interval contains it.

AI-written and checked against the verified answer.