Final answer:
When developing a technique chart for canines, it's advisable to select a median average weight, possibly around 20 to 30 pounds, to cover a broad range of sizes and to minimize systematic error and measurement deviations.
Step-by-step explanation:
When selecting a canine for developing a technique chart, it's necessary to choose a baseline average weight that is representative of the dogs typically examined and for which the chart will be most frequently used. Considering the discussion around systematic errors and the need for detectable differences in weights during a study, a reasonable average weight for a canine in a near-midrange could be used.
For practical purposes and to accommodate a broad range of canine sizes within a clinic setting, an average weight might typically be around 20 to 30 pounds. This facilitates a good median to develop technique charts that can accommodate slight variations up and down the scale without causing significant measurement deviations.