To solve this problem, we make use of the z statistic.
The formula for the confidence interval can be calculated using the formula:
Confidence Interval = p ± MOE
where,
p is the portion of girls = 278 / 556 = 0.5
MOE is the margin of error
We calculate the margin of error using the formula:
MOE = z * sqrt[p (1 – p) / n]
From the standard distribution tables, the value of z at 99% confidence is:
z = 2.58
Therefore the MOE is:
MOE = 2.58 * sqrt[0.5 (0.5) / 556]
MOE = 0.055
Therefore the confidence interval is:
Confidence Interval = 0.5 ± 0.055
Confidence Interval = 0.445, 0.555
0.445<p<0.555
Answer:
the first one is 350 inches (350 in) and the second on is 350 square inches (350 in2)
Step-by-step explanation:
2(-3)2 -5(4). -12 -20= -32. It's this because you plug -3 and 4 into x and y. Then if you answer it out it equals -32
Answer:
The value of n
n = 0.86
n = -0.73
Step-by-step explanation:
Given:
The given equation is
We need to find the value of n when d = -2n.
Solution:
Rewrite the given equation as
Substitute d = -2n in above equation.
Now, we first find the root of the above equation.
Use quadratic formula with .
Put a, b and c value in above equation.
For positive sign
n = 0.86
For negative sign
n = -0.73
Therefore the value of n = 0.86 or n = -0.73
0.72 because when you divide 2.16 by 3 you will get 0.72