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Select the best answer, then click the 'submit Answer' button or press on Your keyboard. You will be allowed to answer (and must answer) any skipped questions before the test is scored. If the equation of the regression line between two variables x and y is given by the equation (y-hat) = 2-3. 1x for values of x between 1 and 10, and the correlation coefficient r = -0.92 consider the following statements and identify which are true. 92% of the variation in y is explained by the x variable Indications are there is a strong negative correlation between y and x Indications are there is a strong positive correlation between y and x If x = 5, one would estimate y = -13.5 Only I and IV are true Only I, II, and IV are true Only I III and IV are true Only II and IV are true Only III and IV are true

Explanation / Answer

The sign of r indicates, negative correlation and the value (nearing to -1) indicates that there is pretty strong negative correlation among X and Y.

Substituting X with 5 in regression equation, the estimated Y is -13.5

Therefore, II and IV is correct. (D)

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