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To test the significance of the slope of a regression line, the appropriate test is: Select one: a.A t test, with df = n-1. b.A

To test the significance of the slope of a regression line, the appropriate test is:

Select one:

a.A t test, with df = n-1.

b.A z test, with df = n-2.

c.A z test, with df = n-1.

d.A t test, with df = n-2.

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