A test is made of Ho: µ=20 versus H₁: μ≠20. A sample of size n=55 is drawn, and x̄= 18. The population standard deviation is

Question

A test is made of Ho: µ=20 versus H₁: μ≠20. A sample of size n=55 is drawn, and x̄= 18. The population standard deviation is σ=8.
(a) Compute the value of the test statistic z.
(b) Is Ho rejected at the α=0.10 level?
(c) Is Ho rejected at the α=0.05 level?
(a) Compute the value of the test statistic. Round the answer to at least two decimal places.

Kunduz · Accepted Answer

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