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1. What about least squares method makes it useful? Why? 2. Without the help of advanced software (such as Excel), how cumbersome do you think

1. What about least squares method makes it useful? Why? 2. Without the help of advanced software (such as Excel), how cumbersome do you think it would be to solve one of these problems? 3. How do you think statisticians solved simple linear regression applications before the advent of the personal computer (or calculators)?

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