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Why is it desirable to have the explanatory variables

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Reference no: EM13609707

Why is it desirable to have the explanatory variables spread out to test a hypothesis regarding B1 or construct confidence intervals about B1?

1. So the mean of B1 is smaller
2. So the mean of B1 is larger
3. So the standard deviation of B1 is smaller
4. So the standard deviation of B1 is larger

Reference no: EM13609707

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