The z-value that corresponds to a two-tailed 95% confidence interval is z = +/- 1.96. Then the bounds of the confidence interval can be determined as:
Lower bound = mean - z*SD/sqrt(n) = 20 - 1.96*2/sqrt(100) = 20 - 0.12 = 19.88 hours
Upper bound = mean + z*SD/sqrt(n) = 20 + 1.96*2/sqrt(100) = 20 + 0.12 = 20.12 hours
So the first choice is the correct answer: 19.88-20.12 hours
Answer:
(1,5) is not a solution to the system of equations
Step-by-step explanation:
To find the point (1, 5) is a solution to the system of equations.
We look at the intersection of both graphs given
Both graphs intersects at (0,2)
Intersection of two graphs is the solution of system of equations
Two graphs intersects at (0,2). so (0,2) is the solution of system of equations
(1,5) is not a solution to the system of equations
Answer:
0 I think
Step-by-step explanation: