Weekly Quiz -1 Predictive Modeling (Linear Regression).pdf...

Weekly Quiz - 1 (Predictive Modeling)
Type : Graded Quiz Attempts : 1/1
Questions : 10 Time : 20m
Question No: 1
Degree of
freedom
Sum of
squares
Mean of the
squares
Regression 1
1258.548639
(SSR)
1258.548639
(MSR)
Residual 6
773.4513612
( SSE)
128.9085602
(MSE)
Total 7
2032
(SST)
Based on the above Table what is the value of F Statistic?
1.62
6
0.61
9.76
Note: The F value is the ratio of the mean regression sum of squares (MSR) divided by the
mean error sum of squares (MSE) So F Statistic is 1258.548639 / 128.9085602 = 9.76
(rounded to 2 decimal places).
Question No: 2
Correlation Coefficient takes values between +1 and -1.
True
False
Note: Correlation coefficient formulas are used to find how strong a relationship is between
data. The formulas return a value between -1 and 1.

Question No: 3
As per assumptions of Linear Regression: Variance of the error terms should be
Heteroscedastic
Homoscedastic
Note: The error terms should be Homoscedastic i.e. the error terms should have constant
variance across different values of independent variable.
Question No: 4
Df Sum of squares
Mean of the
squares
Regression
1258.548639
1