RaisaVidetto865 RaisaVidetto865 06-05-2015 Biology Answered The lengths of a sample of tiger canines were measured. 68% of the lengths fell within a range between 15 mm and 45 mm. The mean was 30 mm. What is the standard deviation of this sample? A. 5 mm B. 15 mm C. 7.5 mm D. 30 mm