If a sample of size 18 has a linear correlation coefficient of _0.50 is there significant reason

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If a sample of size 18 has a linear correlation coefficient of _0.50 is there significant reason to conclude that the linear correlation coefficient of the population is negative? Use a = 0.01
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Elementary Statistics

ISBN: 9780538733502

11th Edition

Authors: Robert R. Johnson, Patricia J. Kuby

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