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Can someone please help me on this problem? Thank you! A test is made of H: H-20 versus H : u #20. A sample of

Can someone please help me on this problem? Thank you!
A test is made of H: H-20 versus H : u #20. A sample of size n -55 is drawn, and x - 18. The population standard deviation is 0= 8. (a) Compute the value of the test statistic z. (b) Is Ho rejected at the a=0.10 level? (c) Is Ho rejected at the a=0.05 level

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