Answer:
A = 12.56 m²
General Formulas and Concepts:
<u>Pre-Alg</u>
- Order of Operations: BPEMDAS
<u>Geometry</u>
- Area of a Circle: A = πr²
- d = 2r
Step-by-step explanation:
<u>Step 1: Define</u>
d = 4 m
<u>Step 2: Find </u><em><u>r</u></em>
- Substitute: 4 = 2r
- Isolate <em>r</em>: 2 = r
- Rewrite: r = 2 m
<u>Step 3: Find Area</u>
- Substitute: A = π(2)²
- Substitute: A = (3.14)(2)²
- Evaluate: A = (3.14)(4)
- Multiply: A = 12.56 m²
Answer:
18
Step-by-step explanation:
Answer:
The value of the standard error for the point estimate is of 0.0392.
Step-by-step explanation:
Central Limit Theorem
The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean
and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
.
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean
and standard deviation ![s = \sqrt{\frac{p(1-p)}{n}}](https://tex.z-dn.net/?f=s%20%3D%20%5Csqrt%7B%5Cfrac%7Bp%281-p%29%7D%7Bn%7D%7D)
In a randomly selected sample of 100 students at a University, 81 of them had access to a computer at home.
This means that ![n = 100, p = \frac{81}{100} = 0.81](https://tex.z-dn.net/?f=n%20%3D%20100%2C%20p%20%3D%20%5Cfrac%7B81%7D%7B100%7D%20%3D%200.81)
Give the value of the standard error for the point estimate.
This is s. So
![s = \sqrt{\frac{0.81*0.19}{100}} = 0.0392](https://tex.z-dn.net/?f=s%20%3D%20%5Csqrt%7B%5Cfrac%7B0.81%2A0.19%7D%7B100%7D%7D%20%3D%200.0392)
The value of the standard error for the point estimate is of 0.0392.
You divide 42 by 7 which equals 6
The correct is 40 hope I helped