/  Regression-quiz-3

This Quiz contains totally 10 Questions each carry 1 point for you.

1. If two variables are correlated, is it necessary that they have a linear relationship?

Yes
No

### Wrong!

2. Correlated variables can have zero correlation coeffficient. True or False?

True
False

### Wrong!

3. The graph below represents a regression line predicting Y from X. The values on the graph shows the residuals for each predictions value. Use this information to compute the SSE. 3.02
0.75
1.01
None of above

### Wrong!

4. Height and weight are well known to be positively correlated. Ignoring the plot scales (the variables have been standardized), which of the two scatter plots (plot1, plot2) is more likely to be a plot showing the values of height (Var1 – X axis) and weight (Var2 – Y axis). Plot2
Plot1
Both
Can't say

### Wrong!

5. Suppose the distribution of salaries in a company X has median \$35,000, and 25th and 75th percentiles are \$21,000 and \$53,000 respectively. Would a person with Salary \$1 be considered an Outlier?

Yes
No
None of these

### Wrong!

6. Which of the following option is true regarding “Regression” and “Correlation” ? Note: y is dependent variable and x is independent variable.

The relationship is symmetric between x and y in both.
The relationship is not symmetric between x and y in both.
The relationship is not symmetric between x and y in case of correlation but in case of regression it is symmetric.
The relationship is symmetric between x and y in case of correlation but in case of regression it is not symmetric.

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Regression Models – Quiz3

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