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The two lines of regression are 8 x-10 y=66 and 40 x-18 y=214 , and variance of x series is 9 . What is the standard deviation of y series?

Options

  1. A3
  2. B4
  3. C6
  4. D8

Correct answer

B. 4

Step-by-step solution

The correct answer is option (B).

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