Historically, the time spent by dcsi3710 students on trying to certify any hls homework is known to have a mean of 29 minutes. in order to examine the claim that homework 9.4 was actually less time consuming, an instructor asked 10 students how much time they spent on it. their times had a mean of 23 minutes and a sample standard deviation of 11 minutes. conduct the appropriate hypothesis test, at the 5% significance level.