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The weight of 10-week-old male children is distributed given a normal with a standard deviation of 87 grams. How much data is enough to estimate, with a 95% confidence, the average weight of this population with an error not superior to 15 grams?

I can't use a sample size calculator.​

User Mike Chess
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Explanation:

hope this helps ..........

The weight of 10-week-old male children is distributed given a normal with a standard-example-1
User Rjmoggach
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