Answer:
Option D) At least 3600
Step-by-step explanation:
We are given the following in the question:
The distribution of scores of individual students on the American College Testing is a bell shaped distribution that is a normal distribution.
Population standard deviation =
![\sigma = 6.0](https://tex.z-dn.net/?f=%5Csigma%20%3D%206.0)
We want that the standard deviation of the sample should not be more than 0.1 that is the standard error should not be more than 0.1
Formula for standard error:
![S.E = \dfrac{\sigma}{\sqrt{n}}](https://tex.z-dn.net/?f=S.E%20%3D%20%5Cdfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D)
![S.E\leq 0.1\\\\\dfrac{\sigma}{\sqrt{n}}\leq 0.1\\\\\dfrac{6}{\sqrt{n}}\leq 0.1\\\\\sqrt{n}\geq \dfrac{6}{0.1}\\\\\sqrt{n}\geq 60\\n\geq 3600](https://tex.z-dn.net/?f=S.E%5Cleq%200.1%5C%5C%5C%5C%5Cdfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%5Cleq%200.1%5C%5C%5C%5C%5Cdfrac%7B6%7D%7B%5Csqrt%7Bn%7D%7D%5Cleq%200.1%5C%5C%5C%5C%5Csqrt%7Bn%7D%5Cgeq%20%5Cdfrac%7B6%7D%7B0.1%7D%5C%5C%5C%5C%5Csqrt%7Bn%7D%5Cgeq%2060%5C%5Cn%5Cgeq%203600)
Thus, the sample size must be atleast 3600 so that the sample standard deviation is not more than 0.1.
Thus, the correct answer is
Option D) At least 3600
Well the area of the triangle is 18 so Id figure if my math is correct x = 3
Răspuns:
1
Explicație pas cu pas:
Fie numărul = x
x + 4 = e - - (1)
e * 4 = f - - - (2)
Ecuația 2 - 4 împărțită la 4 = 4
(f - 4) / 4 = 4
Crucea se înmulțește
f - 4 = 16
f = 16 + 4
f = 20
Rezultatul 1 împărțit la 4 este egal cu 4
Prin urmare,
e = f / 4
f = 20
e = 20/4
e = 5
De la (1)
x + 4 = e
x + 4 = 5
x = 5 - 4
x = 1
Answer:69
Step-by-step explanation: