The proportion of baby elephant that weigh less than 150 pounds is 2%.
How to calculate the weight of the baby elephant?
The proportion of baby elephant that weigh less than 150 pounds is calculated by applying the following method as shown below;
One standard deviation below the mean is calculated as;
M - 1 STD = 200 lb - 25 lb
= 175 lb
Two standard deviation below the mean is calculated as;
M - 2 STD = 200 lb - 2 (25 lb)
M - 2 STD = 200 lb - 50 lb
M - 2 STD = 150 lb
Using empirical rule, two standard deviation below the mean is equal to 2%.
Thus, the proportion of baby elephant that weigh less than 150 pounds is 2%.
The complete question is below:
The weights of baby elephant can be modeled by a normal distribution with mean m= 200 lb in standard deviation of 25 lb.
Use empirical rule to estimate the proportion of baby elephant weigh less than 150 pounds