Linear Regression Find a Value in Least Squares Method

Learn how to find the value of a in the least squares method with this quick guide. In linear regression, the formula a = y bar - b x bar is used to determine a's value efficiently. This method is crucial for fitting data accurately in statistics and mathematics, especially in the 12th-grade commerce math curriculum. Question: In the least squares method, how is the value of a obtained? Options: 1) a = y bar - b x bar, 2) a = x bar - b y bar, 3) a = sum of (x_i - x bar)(y_i - y bar) / sum of (x_i - x bar)^2, 4) a = sum of x_i y_i - n x bar y bar / sum of x_i^2 - n x bar^2. Correct answer: a = y bar - b x bar.

Standard: 12th
Subject: Mathematics & Statistics
Medium: English

Chapter: Linear regression
Chapter Number: 3
Book Page: 34

Difficulty: easy

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