Answer:
D. A number divided by three minus fifteen.
Answer:
![s_{p_1-p_2}=\sqrt{\frac{p_1(1-p_1)}{n_1}+\frac{p_2(1-p_2)}{n_2} }](https://tex.z-dn.net/?f=s_%7Bp_1-p_2%7D%3D%5Csqrt%7B%5Cfrac%7Bp_1%281-p_1%29%7D%7Bn_1%7D%2B%5Cfrac%7Bp_2%281-p_2%29%7D%7Bn_2%7D%20%7D)
Step-by-step explanation:
The formula for the standard error of the difference between the estimates od the population proportions is:
![s_{p_1-p_2}=\sqrt{\frac{p_1(1-p_1)}{n_1}+\frac{p_2(1-p_2)}{n_2} }](https://tex.z-dn.net/?f=s_%7Bp_1-p_2%7D%3D%5Csqrt%7B%5Cfrac%7Bp_1%281-p_1%29%7D%7Bn_1%7D%2B%5Cfrac%7Bp_2%281-p_2%29%7D%7Bn_2%7D%20%7D)
This is expected, as the variance of a sum (or a substraction) of two random variables is equal to the sum of the variance of the two variables.
Then, the standard error (or standard deviation) is the square root of this variance.
Answer:
|5| = |-5|
|-4| > -6
-5 < |-9|
|-4| < 7
Step-by-step explanation:
In absolute value the negative signs don't matter and you have to think of them as just the number.
EXAMPLE
|-4| = 4
|5| = 5
NON EXAMPLE
|-4| = -4
Answer:
Option A
Step-by-step explanation:
If the length is twice as long as the width (14 ft), that makes it 28 ft. (14 x 2=28)
14 ft x 28 ft = 392 square feet
Answer:
<h2>Yes the circumference is about times greater than their diameters</h2>
Step-by-step explanation:
We will approach this problem by doing a check
Say the diameter of a circle is 4 cm
Hence the radius is 3 cm
We know that the circumference is ![C=2\pi r](https://tex.z-dn.net/?f=C%3D2%5Cpi%20r)
![C=2*3.142*2= 12.57cm](https://tex.z-dn.net/?f=C%3D2%2A3.142%2A2%3D%2012.57cm)
The circumference is about 3 time bigger than the diameter
Let us try another case say the diameter is 6 cm
The radius is 3 cm
![C=2*3.142*3= 18.85cm](https://tex.z-dn.net/?f=C%3D2%2A3.142%2A3%3D%2018.85cm)