Asked Jan 7, 2020

Explain the difference between the quantities Σxi yi and (Σxi )(Σyi ). Provide an example to show that, in general, those two quantities are unequal.


Expert Answer

Step 1

For Σxi yi, first product the observations, xi and yi and then add the product values of xi×yi.

For (Σxi )(Σyi ), first add the observations of xi and yi seperately. then multiply sum value obtained for xi and yi.

Step 2

Consider the observations x...

Statistics homework question answer, step 2, image 1

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