Question: A random sample of 20 observations selected from a normal population produced = 72.6 and s2 = 19.4. a. Test H0: = 80

A random sample of 20 observations selected from a normal population produced = 72.6 and s2 = 19.4.
a. Test H0: µ = 80 against Ha: µ < 80. Use α = .05.
b. Test H0: µ = 80 against Ha: µ ≠ 80. Use α = .01.

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