The correlation between number of hours and efficiency of work is

perfect positive

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perfect negative

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imperfect positive

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imperfect negative

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Solution

The correct option is D imperfect negative
relationship between their output and their working hours
$∴$ The correlation between number of hours and efficiency of work is imperfect negative
Option D is correct

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If the slope of the line of best fit for two variables is negative, then the correlation between the variables is also negative. State true or false.

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