PLEASE HELP2. Mr. Wilcox has done over 50 track days at Gingerman Raceway in South Haven Michigan. He keeps track of each lap time (in seconds) and has found that they follow an approximately

normal distribution. A random sample of 9 laps shows a mean laptime of x = 102.4 seconds

with a standard deviation of s, = 3.2 seconds. Create a 90% confidence interval for Mr.

Wilcox's career average lap time.