OMGT Quiz 5

If the sample covariance between two variables is 5 and the variance of each variable is 100, then the correlation coefficient is approximately:

0.05

If the sample covariance between two variables is 10 and the variances of each variable is 50, then the correlation coefficient is approximately:

0.2

If the sample covariance between two variables is 50, the correlation coefficient is 0.75, and the standard deviation of one of the variables is 10, then the standard deviation of the other variable is approximately:

6.67

The standard error for a correlation of 50% with a sample size of 25 is approximately:

18%

If the correlation coefficient between is 0.25 and the standard deviation of the variables is 20 and 5, respectively, then the sample covariance is approximately:

25

If the Excel calculated covariance is 25 for a sample size of 25, then the sample covariance is approximately:

26

If the sample covariance is 50 for a sample size of 50, then the Excel calculated covariance is approximately:

49

If the sample covariance between two variables is 25, the correlation coefficient is 0.50, and the standard deviation of one of the variables is 10, then the standard deviation of the other variable is approximately:

5

If the correlation coefficient between two variables is 0.50 and the standard deviation of the variables is 5 and 25, respectively, then the sample covariance is approximately:

Between 25 and 100

If the correlation coefficient between two variables is 0.05, then the sample covariance is approximately:

Impossible to determine with any level of accuracy

If the sample covariance between two variables is 50, and then the correlation coefficient is approximately:

Impossible to determine with any level of accuracy

If the sample covariance between two variables is 50, the correlation coefficient is 0.75, then the standard deviation of the other variable is approximately:

Impossible to determine with any level of accuracy

The standard error for a correlation of 50% is approximately

Impossible to determine with any level of accuracy

As a crude approximation, t-statistics are significant for all values

Less than -2 or greater than +2

If the sample covariance between two variables is 10, then the correlation coefficient is approximately:

None of these answers

If the sample covariance is 100, then the Excel calculated covariance is approximately:

None of these answers

If the sample covariance is 50, then the Excel calculated covariance is approximately:

None of these answers

The t-statistic for a correlation of 50% with a sample size of 10 is:

Not statistically significant

If the correlation between two variables X and Y is -0.50, then:

There is an inverse relationship between the variables

If the correlation between two variables X and Y is 0, then:

There is no linear relationship between the two variables