Question: How to solve A random sample of size n, = 28, taken from a normal population with a standard deviation of = 6, has a

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A random sample of size n, = 28, taken from a normal population with a standard deviation of = 6, has a mean X, = 76. A second random sample of size n2 = 33, taken from a different normal population with a standard deviation 02 = 4 has a mean X2 = 38. Find a confidence interval for #1 - #2. om

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