The critical values at the 1% level of significance (99% confidence) are 2.348 for a one-tail test and 2.604 for a two-tail test (df = 176).
The t-values for the hypotheses are:
Hypothesis 1: 11.7 / 6.8 = 1.72
Hypothesis 2: 14.2 / 5.4 = 2.63
Hypothesis 3: 12.0 / 2.6 = 4.6, so the hypothesis is that the coefficient is 4.6, and the t-stat of that hypothesis is 0.
Hypothesis 4: (5.2 + 1) / 5.9 = 1.05
Hypotheses 1 and 3 are one-tail tests; 2 and 4 are two-tail tests. Only Hypothesis 2 exceeds the critical value, so only Hypothesis 2 should be rejected.
