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Confidence interval for the true calcium content

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Reference no: EM131167967

The calcium (Ca) content of a powdered mineral substance was analyzed 10 times with the following percent compositions recorded:

0.0271 0.0282 0.0279 0.0281 0.0268

0.0271 0.0281 0.0269 0.0275 0.0276

a. Find a 99% confidence interval for the true calcium content of this substance.

b. What does the phrase "99% confident" mean?

c. What assumptions must you make about the sampling procedure so that this confidence interval will be valid? What does this mean to the chemist who is performing the analysis?

Reference no: EM131167967

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