Answer:
Vertex: (1, 6)
Axis of symmetry: x = 1
Step-by-step explanation:
Answer:
x = 4
Step-by-step explanation:
The 2 graphs have the same output, y = 3 at the point of intersection
This occurs when the input is x = 4
You won’t know because we don’t know how much girls are in the track
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
