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2 3 A test is made of Ho: u = 20 versus H,: u A test is made of Ho: B = 20 versus HI:

2 3 A test is made of Ho: u = 20 versus H,: u

A test is made of Ho: B = 20 versus HI: g < 20. A sample of size n =52 is drawn, and = 18, The population standard deviation is = 6. (a) Compute the value of the test statistic z. (b) Is HO rejected at the 0.05 level? (c) Is HO rejected at the 0=0.01 level?

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