Given the following data what measure of central tendency would be the most effective measure of central tendency? Salaries for 20 marketing managers: $40.00 $63.40 $52.90 $54.70 $87.70 $77.10 $66.50 $69.20 $65.70 $51.50 $58.70 $46.60 $67.70 $150.00 $77.10 $65.60 $71.70 $55.50 $77.10 $64.3 O mean standard deviation mode median