Dr. james found a correlation of -0.63 between exercise and weight loss in men over 40. this would be considered a correlation.

The answer is weak negative

Since the correlation is negative, the correlation would be the opposite of the hypothesis. If the number of correlation is near zero, it shows that the correlation is weak while further from zero show the correlation is strong. The number of correlation in this question is near zero (0.63) so it should be considered weak.

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during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.