We surveyed a random sample of 15 domestic violence victims in Columbus, GA, who used the 911. From this sample, 911 response time from calling to police arrival was 8.5 minutes on average with a...

We surveyed a random sample of 15 domestic violence victims in Columbus, GA, who used the 911. From this sample, 911 response time from calling to police arrival was 8.5 minutes on average with a standard deviation of 2.7 minutes.

From the estimation of the population mean (μ) of the arrival time with a 99% confidence interval, what is thelower limit? (Round off to two decimal places if necessary).