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Reason (R): In the linear regression task, each observation is made up of the value of the dependent variable and the
value of the independent variable.
Answer the question selecting the appropriate option given below:
a. Both A and R are true and R is the correct explanation of A
b. Both A and R are true and R is not the correct explanation of A
c. A is true but R is false
d. A is false but R is true
Ans. b
Unsolved Questions
SECTION A (Objective Type Questions)
uiz
A. Tick ( ) the correct option.
1. In the regression equation y= 56 - 1.8x the slope is
a. 56 b. -56
c. 1.8 d. -1.8
2. In regression, the difference between the actual y value and the predicted y value is called the .
a. slope b. outlier
c. residual d. y-intercept
3. The slope of the regression line is interpreted in algebra as .
a. rise over run b. rise
c. run d. slant
4. For a dataset, the regression equation is y = 47.2 – 12x. Then the correlation coefficient of this data must be
.
a. zero b. negative
c. positive d. one
5. graph is best suited for testing the linear relationship between a dependent and independent
variable.
a. Bar chart b. Scatter plot
c. Pie chart d. Line chart
B. Fill in the blanks.
1. are data points that are significantly different from other observations.
2. The line that passes close to most of the data points is called the .
3. The best straight line through the data is horizontal when r = .
4. Regression is of two types and .
5. Contingency tables are used for values.
C. State whether the following statement is True or False.
1. Regression is used to predict the value of the variable that is dependent on the second variable.
292 Touchpad Artificial Intelligence (Ver. 2.0)-XI

