Answer:
Follows are the solution to the given points:
Step-by-step explanation:
In point A:

In point B:

In point C:
For df = 70, the top 5% critical t score
tcrit = 1.666914479
Thus,

In point D:
For df = 70, the top 5% critical t score
tcrit = -1.666914479

In point E:
The lower cutoff is 0.10 in the center, which would be around 80 %. The critical point therefore is
tcrit = -1.293762898

In point F:
The lower cutoff is 0.90 in the center, which would be around 80 %. The critical point therefore is
tcrit = 1.293762898

X = -(-1) +/- sqrt((-1)^2 - 4*4*3)
------------------------------------ = 1/8 +/- sqrt47i
2 * 4
None of the choices are correct
Answer:
It was a 270% markup. Divide the two to get 2.7, which, in percentage form would be 270%