The following regression models are estimated based on a sample of 30 observations (n = 30). The SSR of each estimated model are also reported. y hat = 0.123 +4.56x1 + 0.078x2 -9.1x3 SSR=120.5

y hat = 6.2 +1.07x2 SSR=204.59 by using a joint test then which of the following statements provide correct test outcome o? a) The calculated F is 8.93 and the critical value of F with 3 and 26 df is 2.98 at the 5% level. Hence the variables x 1 and x 2 are jointly significant. b) The calculated F is 5.84 and the critical value of F with 2 and 30 df is 3.32 at the 5% level. Hence the variables x 1 , x 2 and x 3 are jointly significant. c) The calculated F is 4.05 and the critical value of F with 2 and 30 df is 5.39 at the 1% level and hence the variables x1 and x3 are not jointly significant. d) The calculated F is 9.05 and the critical value of F with 2 and 26 df is 5.53 at the 1% level and hence the variables x and x3 are jointly significant.

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