Answer:
Step-by-step explanation:
a)
Confidence interval in less than symbol expressed as

Where
is sample mean and
is margin of error.

b)
The given t interval is 
That is
and
Solve these two equation by adding together.
Solve this value of \bar{x} in equation
and solve for

Best point estimate of 
Best point estimate of margin of error = 0.193
c)
Since sample size = 100 which is sufficiently large (Greater than 30) , it is no need to confirm that
sample data appear to be form a population with normal distribution.
Sin (37°) = opposite side/Hypotenuse
sin (37°) =CV/55 →CV = 55.si (37°)
CV = 55 x (0.601815)
CV= 33
The equation youre using is y=mx+b
b is the y int which 3 and the slope between the points is 5/2 so your equation is y=5/2x+3
ANSWER
C(2,-6)
EXPLANATION
The solution set to given inequality is the shaded region.
The points are also located in the graph above.
The only point that falls in the solution region is C(2,-6)
The ordered pair that is in the solution set is C(2,-6)
The third option is correct.