Which of the following answers is true?

> cor (df) Age Wage Experience Age X1 0. 55 0. 76 Wage X2 X4 X5 Experience X3 0.31 X6 Which of the following is true? Hint: Write out what the values of X1 through X6 are before answering the question. Double Hint: X1 is the correlation between the variables Age and Age. The same idea applies to all the other X's. O X4 is equal to X3. O X3 is positive O X5 is equal to X6. O X2 is negative