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Suppose the correlation between age and number of hours of sleep per night for adults is -0.70. What proportion (or percentage) of the variability in

Suppose the correlation between age and number of hours of sleep per night for adults is -0.70. What proportion (or percentage) of the variability in nightly hours of sleep can be explained by the relationship with age? a. 70% b. 49% c. 30% d. 0%

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