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) + cx log(HEXP) + d x LTU Select the Null and Alternative Hypotheses for the relationship of interest Select one: O Ho: a = 0 and b = 0 and c = 0 and d = 0 HA: a 0 and b #0 and c# 0 and d #0 O Ho: a = 0 and b = 0 and c = 0 and d = 0 HA: C#0 Ho: b = 0 HA: b #0 O Ho: c = 0 HA: C# 0 Ho: a = 0 HA: a #0

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