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. Point C on this Normal curve corresponds to A) 84 grams. B) 82 grams. C) 78 grams. D) 76 grams. E) 76 (grams)².

Question

Quizplus · Accepted Answer

The mean of the Normal distribution is 80 grams, which corresponds to the mid-point of the curve. Since the standard deviation is 2 grams, point C, which is one standard deviation below the mean, corresponds to 78 grams (80-2 = 78). Therefore, the best choice is C.

The Weights of Cockroaches Follow a Normal Distribution with Mean