Chapter 8.2, Problem 25E

Body armor provides critical protection for law enforcement personnel, but it does affect balance and mobility. The article “Impact of Police Body Armour and Equipment on Mobility” (Applied Ergonomics, 2013: 957–961) reported that for a sample of 52 male enforcement officers who underwent an acceleration task that simulated exiting a vehicle while wearing armor, the sample mean was 1.95 sec, and the sample standard deviation was .20 sec. Does it appear that true average task time is less than 2 sec? Carry out a test of appropriate hypotheses using a significance level of .01.