For a sample of nine items, the critical value of Student's t for a left-tailed test of a mean at α = .05 is -1.860.

Name: For a sample of nine items, the critical value of Student's t for a left-tailed test of a mean at α = .05 is -1.860.
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This is true according to the t-distribution table with 8 degrees of freedom for a one-tailed test at α = .05. The critical value for a left-tailed test is -1.860.

For a Sample of Nine Items, the Critical Value of Student's