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?

4543

Step-by-step explanation:

Given : The weights of 5400 registered female Labrador retrievers in the United States are distributed normally with a and a standard deviation of .

Using formula , the z-score corresponding to x= 65 will be :-

Using the z-value table , we have

i.e. Proportion of people weigh less than 65 lb= 0.8413

Now, the number of people weigh less than 65 lb =

Hence, the approximate number of people weigh less than 65 lb= 4543

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step-by-step explanation:

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