Jerry wants to test the impact of age on individuals' attitude toward Will Smith incident (measured using a 1-7 Likert scale), so...

1. If age is measured using a binary nominal scale (young vs. senior), then we can use a paired t-test.
2. If age is measured using a nominal scale (15-25 vs. 26-38 vs. 39+), then we can use an independent t-test.
3. If age is measured using a continuous measure (actual age number), then we can use a bi-variate correlation.

Please select one