Paper 1 · Research Aptitude
UGC NET June 2024 Re-Exam (21.08.2024) Shift-I
The uses of the student's t-test are which of the following? Choose the correct answer from the options given below.
- 1. To compare two groups to see if their means differ
- 2. To compare multiple groups (more than two) to see if their means differ
- 3. To test the significance of a correlation coefficient
- 4. To test the significance of a regression coefficient
A1, 2 and 3 only
B2 and 4 only
C1, 3 and 4 only ✓ Correct
D1, 2, 3 and 4
Correct answer: (C) 1, 3 and 4 only — The t-test is used for comparing two groups, testing a correlation coefficient and testing a regression coefficient, so the answer is 1, 3 and 4.
Explanation
★The t-test is used for comparing two groups, testing a correlation coefficient and testing a regression coefficient, so the answer is 1, 3 and 4.
★The t-test compares the means of two groups to see if they differ.
★It can test whether a correlation coefficient is significantly different from zero.
★It can also test the significance of a regression coefficient.
★So statements 1, 3 and 4 are valid uses.
★Comparing more than two groups uses analysis of variance, not a t-test, so statement 2 is excluded.
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