The mean length of a small counter balance bar is 43 millimeters

a. What is Ho: _______________________
A) µ = 43
B) µ < 43
C) π = 43
D) µ ≠ 43

b. What is H1:________________________ 
A) µ = 43
B) µ < 43
C) π = 43
D) µ ≠ 43

c. What is the value of p:_________________________ 
A) .028
B) .014
C) .14
D) 2.91

c. What is the decision
A) Do not reject Ho
B) Reject Ho

d. What is the conclusion
A) There has been a significant change in the mean length of the bars
B) There has been no change in the mean length of the bars