### Statistics: Coefficient and Confidence interval - mean

See attached file for 3 problems: time for Speedy-Lub oil change, Google manager's salaries, Accu-Copiers' service times 2. The length of time to do a complete full service oil change at Speedy-Lube is normally distributed with a mean of 15.8 minutes and a standard deviation of 2.2 minutes X P(X < x) P(X > x) Mean Std dev 1