Suppose that the weights of 5400 registered female labrador retrievers in the united states are distributed normally with a mean of 62.5 lb and a standard deviation of 2.5 lb. approximately how many of the labrador retrievers weigh less than 65 lb? enter your answer in the box.

Labrador retrievers

Step-by-step explanation:

We know that the mean is:

and the standard deviation is:

The probability that a randomly selected Labrador retriever weighs less than 65 pounds is:

We calculate the Z-score for X =65

So

Looking in the table for the standard normal distribution we have to:

.

Finally the amount N of Labrador retrievers that weigh less than 65 pounds is:

Labrador retrievers

d

step-by-step explanation:

d