After Controlling for Z,the Partial Correlation Coefficient Is

question 7

Multiple Choice

After controlling for Z,the partial correlation coefficient is .78.The bivariate Pearson's r between X and Y was only .51.Which interpretation is consistent with these results?

• A)None,these results are mathematically impossible.
• B)There is a spurious relationship between X and Y.
• C)X and Z are both caused by Y.
• D)X and Z are separate,uncorrelated causes of Y.

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Definitions:

Direct Labor Time Variance

The difference between the actual time taken to manufacture a product and the standard time expected, multiplied by the wage rate, indicating inefficiency or efficiency in production.

Standard Hours Per Unit

The predetermined amount of time expected to be required to produce one unit of a product under standard operating conditions.

Direct Materials Quantity Variance

The difference between the actual quantity of materials used in production and the standard quantity expected, multiplied by the standard cost per unit.

Direct Labor Time Variance

The difference between the actual time taken to complete a task and the standard time expected, multiplied by the labor rate.