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Which of the following statements is/are correct about the error in linear regression? Please select all that apply. It's possible that there is only one
Which of the following statements is/are correct about the "error" in linear regression? Please select all that apply. It's possible that there is only one correct answer.
A. An error is an unknown fixed number.
B. An error is a random variable.
C. An error is the difference between an observed value of the response variable and its fitted value
D. Every observation (data point) has an error.
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