24. The Elora Supply Company (ESC) manufacturers park benches for use in municipal playgrounds. The quality control inspector on each shift selects one bench per hour and counts the number of blemishes on each unit. The sample results are shown below: Sample # Blemishes 1 7 2 3 3 4 4 8 5 2 6 0 4 8 5 9 7 10 10 Given the above information, the standard deviation of the appropriate statistical quality control measure is: ) 50.00 B 12.04 C) 7.07 D 2.99 E) 2.24