You want to find out how sleep deprivation affects motor performance. To study this, you have sleep-deprived subjects (such as parents of newborn babies or night-shift workers) record the number of minutes they sleep each night and take a series of motor performance assessments, with 1 minute being the smallest unit on the scale. Suppose the first subject sleeps 180 minutes. Determine the real limits of 180.   The lower real limit is:     The upper real limit is:     When measuring weight on a scale that is accurate to the nearest 0.2 pound, what are the real limits for the weight of 120 pounds?   119.9–120.1   120–121   119.75–120.25     When measuring weight on a scale that is accurate to the nearest 0.1 pound, what are the real limits for the weight of 187 pounds?   186.95–187.05   186.75–187.25   187–188

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