n = 49; sample mean = 54.8; σ = 28 H0: μ = 50; Ha: μ ≠ 50 a. Compute the test statistic. b. What's the rejection rule? c. At the 0.05 level of significance, your Critical Value is. d. If the test is done at a 5% level of significance, the null hypothesis should.
Added by Sherri W.
Step 1
8 μ = 50 σ = 28 n = 49 Substitute the values into the formula: Z = (54.8 - 50) / (28 / √49) Z = 4.8 / (28 / 7) Z = 4.8 / 4 Z = 1.2 ** Show more…
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