Which of the following are alternative names for the independent variable (usually denoted by x) in linear regression analysis ? (i) The regressor (ii) The regressand (iii) The causal variable (iv) The effect variable
(i) and (iii) only
In linear regression \(y = a + bx\), the independent variable x is the one used to explain or predict y.
It is called the regressor (also predictor or explanatory variable) and the causal variable, since it is taken as the cause of change in y. So (i) and (iii) are alternative names for x.
The regressand and the effect variable are names for the dependent variable y, so (ii) and (iv) do not describe x.
Hence, the answer is (i) and (iii) only.
Similar Questions
Which of the following could be treated as IV/s in the study if scores on logical reasoning are to be treated as outcome variable ?
(I) Gender
(II) Engineering specialization
(III) Marks in semester-end examination
If a researcher was interested in predicting the marks in semester-end examination of civil engineering students only, then which of the following could be treated as predictor variables ?
(I) Engineering specialization
(II) Scores on logical reasoning
(III) Scores on spatial reasoning
(IV) Parents’ annual income
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Important Questions from Variables - Teaching
- Match List I with List II
List I List II Variables Characteristics A. Experimental I. Cannot be altered by researcher B. Organismic II. Uncontrolled but have significant effect on dependent variable C. Assigned III. Manipulated D. Dependent IV. Measurable, can't be manipulated V. Is the presumed cause of dependent variable
Choose the correct answer from the options given below: Extraneous variables are
I. Uncontrolled variables
II. Manipulated variables
III. Non manipulated variables
IV. Distracting variables
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Given below are two statements, one labelled as Assertion (A) and the other labeled as Reason (R) :
Assertion (A) : Independent variables are manipulated by the researcher to see their effect on dependent variables.
Reason (R) : As they lead to the prediction of hypothesized extraneous variables.
In the context of the above two statements, which of the following statement is correct ?
Match the following :
List – I (Variable) List – II (Explanation) a. Independent variable i. It can take on any value from a range of values. b. Dependent variable ii. It is what a researcher wants to eliminate. c. Continuous variable iii. It is systematically varied by the researcher. d. Control variable iv. It is what the researcher wants to explain. Match the LIST-I with LIST-II
LIST-I
Types of variableLIST-II
MeaningA. Extraneous Variable I. A factor that could possibly influence the results and that is kept out of the study. B. Dependent Variable II. A kind of independent variable such as age, sex that cannot be manipulated. C. Control Variable III. A factor that could affect the relationship between the independent and dependent variables but that is not included or controlled. D. Moderator Variable IV. The effect of the independent variable.
Choose the correct answer from the options given below:
