I believe this problem is true.
Answer: 0
Step-by-step explanation:
Answer:
within ±1.96 standard deviations of the sample mean
Step-by-step explanation:
A 95% confidence interval is found using the formula C = 1 - α, and some other stuff, but let's focus on that for now. Using the formula:
.95 = 1 - α
α = .05
If α = .05, that means a 2-sided confidence interval would be found using the sample mean and the Z-score Z(subscript α/2), or Z.₀₂₅ because α AKA .05 divided by 2 = .025. From there, you take this either to your calculator or a Z-table (or perhaps you have a chart that lists the common CI values), and see that for the area to be .025 beneath a standard normal curve, your Z value is ±1.96 ("plus or minus" because we're considering a 2-sided confidence interval).
Answer:
y = 2x - 3.
Step-by-step explanation:
The perpendicular line will have slope - 1 / -1/2 = 2.
Using the point-slope form of the straight line:
y - y1 = m(x - x1)
Here m = 2 and (x1, y1) = (3, 3) so we have:
y -3 = 2(x - 3)
y = 2x - 6 + 3
y = 2x - 3.
Answer: 4n-7
Step-by-step explanation:
