For two random variables X and Y, how many lines of regression are possible?
2
For two variables \( X \) and \( Y \), there are two possible regression lines: one for \( Y \) on \( X \) and another for \( X \) on \( Y \). Thus, the correct answer is **2 lines** of regression.
The term 'categorical' variables is used for the data measured on
The conditions or characteristics that appear, disappear or change in the___________ variable as the experimenter introduces, removes or changes_______ variable.
Identify the dependent variable in the following study. "Effect of computer Assisted Instruction on the learning of Tamil Grammar of IX standard students of Tamilnadu".
| LIST-I Type of Variable | LIST-II Nature |
|---|---|
| A. Dependent Variable | I. Necessary in certain situations to complete cause-effect relations |
| B. Connecting Variable | II. Assumed effect of change |
| C. Extraneous Variable | III. Not measured but may increase or decrease the magnitude of relationship between Independent and Dependent variable |
| D. Independent Variable | IV. Assumed cause of change |