Question: A random sample of size 8 from N(, 72) yielded = 85. Find the following confidence intervals for : (a) 99%. (b) 95%. (c) 90%.

A random sample of size 8 from N(μ, 72) yielded = 85. Find the following confidence intervals for μ:
(a) 99%.
(b) 95%.
(c) 90%.
(d) 80%.

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