1. I am interested in whether there is a relationship between age and income. What should I do? (1 point)

a) perform a chi-square test of age and income

b) calculate a slope coefficient and use a t-test to see if it is significantly different from 0

c) use a two-sample t-test to compare the mean age to the mean level of income

d) use a one-sample t-test to determine if the mean income is greater than 0