.Question 11 At two years of age, the lengths of sardines have an approximately bell-shaped and symmetric distribution with a mean of 21.2 cm and a standard deviation of 0.7 cm. 1. The middle 68% of sardines have a length between ( cm. 2. The middle 95% of sardines have a length between ( cm. 3. The middle 99.7%% of sardines have a length between ( cm. Question Help: Message instructor Submit