HR_​Hypothesis_​Testing

Part 2:

H0= 779 Ha= ?

Q1: ? Q2: 0 Q3: I will reject the null hypothesis with the 5% significance level.

Part 3:

H0= ? Ha= ?

Q1: 0.177 Q2: 0 Q3: I cannot find the null hypothesis.

Part 4:

H0= ? Ha= ?

Q1: Research & Dev. Q2: 513, ?, 0 Q3: I am not sure I could not find the Null Hypothesis.