Awell-designed and safe workplace can contribute greatly to increased productivity. it is especially important that workers not be asked to perform tasks, such as lifting, that exceed their capabilities. the accompanying data on maximum weight of lift (mawl, in kg) for a frequency of four lifts/min was reported in the article the effects of speed, frequency, and load on measured hand forces for a floor-to-knuckle lifting task (ergonomics, 1992: 833843); subjects were randomly selected from the population of healthy males ages 1830. assuming that mawl is normally distributed, does the data suggest that the population mean mawl exceeds 25?