Solving systems of equations using substitution y = 5x + 17. y= -2x -4
1 answer:
You might be interested in
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.