The weights of newborn puppies are normally distributed with mean and standard deviation . If of puppies are classified as underweight, find the threshold weight to the nearest gram (given ).
Answer and explanation
Correct answer: A.
- Step 1: The lowest 10% corresponds to .
- Step 2: .
- Step 3: , which is .
Answer
449 g.
Why not the others: is the upper 10% threshold; uses ; uses .
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