- #1
antonisz
- 27
- 0
Homework Statement
1.) When we collect more data for our confidence interval
(A) Confidence Increases
(B) Confidence Decreases
(C) n decreases
(D) The length of the interval decreases
(E) The length of the interval increases
2.) We wish to determine a confidence interval for the population mean. If we could lower the population standard deviation prior to collecting our data
(A) Confidence Increases
(B) Confidence Decreases
(C) n decreases
(D) The length of the interval decreases
(E) The length of the interval increases
Homework Equations
Z∝/2σ / √n
The Attempt at a Solution
I attempted to solve to test with fake numbers.
n = 10, σ = .5, Z = .15811
n = 10, σ = .25, Z = .07906
So, the lower the population, the length of the interval decreases.
n = 10, σ = .5, Z = .15811
n = 15, σ = .5, Z = .12909
So, as the data increases, the confidence increases.I'm not sure if this is correct, or if is even correct at all.
Thank you!
[/B]