The Weights of Cockroaches Follow a Normal Distribution with Mean

question 49

Multiple Choice

The weights of cockroaches follow a Normal distribution with mean 80 grams and standard deviation 2 grams. The figure below is the Normal curve for this distribution of weights. About what percent of the cockroaches have weights less than 78 grams?

• A) 47.5 percent
• B) 34 percent
• C) 32 percent
• D) 16 percent
• E) 2.5 percent