You are interested in investigating the relationship between national income (GNIPPP) and life expectancy (LE). You estimate the following model:

log(LE) = a + b x log(GNIPPP) + c x log(HEXP) + d x LTU

Select the Null and Alternative Hypotheses for the relationship of interest

Select one:

H₀: c = 0

H_A: c 0

H₀: b = 0

H_A: b 0

H₀: a = 0 and b = 0 and c = 0 and d = 0

H_A: a 0 and b 0 and c 0 and d 0

H₀: a = 0 and b = 0 and c = 0 and d = 0

H_A: c 0

H₀: a = 0

H_A: a 0