Answer:
$28.84
Step-by-step explanation:
That's for the first one that I found, the two other problems I don't know yet.
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:
7 quarts and 1 pint
Step-by-step explanation:
2 pints is equal to a quart
15 pints divided by 2 is 7r1
7 is equal to 7 quarts and r1 is equal to 1 pint.
Answer:
False
Step-by-step explanation:
to determine if (4, 0 ) is a solution to the system, substitute x = 4, y = 0 into the left side of both equations.
If the left side is equal to the right side of both equations then the point is a solution to the system.
- 4 + 6(0) = - 4 + 0 = - 4 ≠ 4
3(4) + 0 = 12 + 0 = 12
since only one equation is true, the point (4, 0 ) is not a solution to the system.
