Question: 3.19 Explain whether it would have been possible to perform one-tailed tests instead of two-tailed tests in Exercise 3.11. If you think that one-tailed tests

3.19 Explain whether it would have been possible to perform one-tailed tests instead of two-tailed tests in Exercise 3.11. If you think that one-tailed tests are justified, perform them and state whether the use of a one-tailed test makes any difference.

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