Increases in worker injuries and disability claims have prompted renewed interest in workplace design and regulation. As one particular aspect of this, employees required to do regular lifting should not have to handle unsafe loads. The article “Anthropometric, Muscle Strength, and Spinal Mobility Characteristics as Predictors of the Rating of Acceptable Loads in Parcel Sorting” (Ergonomics [1992]: 1033–1044) reported on a study involving a random sample of n = 18 male postal workers. The sample mean rating of acceptable load attained with a work-simulating test was found to be x̅ = 9.7 kg. and the sample standard deviation was s = 4.3 kg. Suppose that in the population of all male postal workers, the distribution of rating of acceptable load can be modeled approximately using a normal distribution with mean value μ. Construct and interpret a 95% confidence interval for μ.