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A researcher collected a sample of size 24 from a normal population and produced the following...

A researcher collected a sample of size 24 from a normal population and produced the following 99% confidence interval for the population mean μ, with the population standard deviation known: (15.01, 19.74). Find a 95% confidence interval for μ based on the same sample.
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Answer #1

We know that the 99% confidence interval for population mean is given by:

So,

Adding these equations, we get,

So,

Now, we know that the 95% confidence interval for population mean is given by:

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