Answer: D
Step-by-step explanation:
4r-r+3r can be simplified to just 6r
-s-2s-s can be simplified to just -4s
Answer: (1.64,4.01)
Step-by-step explanation:
The confidence interval for the population variance is given by :-
![\left ( \dfrac{(n-1)s^2}{\chi^2_{n-1,\alpha/2}},\ \dfrac{(n-1)s^2}{\chi^2_{n-1,1-\alpha/2}} \ \right )](https://tex.z-dn.net/?f=%5Cleft%20%28%20%5Cdfrac%7B%28n-1%29s%5E2%7D%7B%5Cchi%5E2_%7Bn-1%2C%5Calpha%2F2%7D%7D%2C%5C%20%5Cdfrac%7B%28n-1%29s%5E2%7D%7B%5Cchi%5E2_%7Bn-1%2C1-%5Calpha%2F2%7D%7D%20%5C%20%5Cright%20%29)
Given : n= 69 ; ![s^2=2.46](https://tex.z-dn.net/?f=s%5E2%3D2.46)
Significance level : ![\alpha=1-0.99=0.01](https://tex.z-dn.net/?f=%5Calpha%3D1-0.99%3D0.01)
Using Chi-square distribution table ,
[by using chi-square distribution table]
Now, the 95% confidence interval for the standard deviation of the height of students at UH is given by :-
![\left ( \dfrac{(68)(2.46)}{101.77592},\ \dfrac{(68)(2.46)}{41.71347} \ \right )\\\\=\left ( 1.64361078731, 4.01021540524\right )\approx(1.64,\ 4.01)](https://tex.z-dn.net/?f=%5Cleft%20%28%20%5Cdfrac%7B%2868%29%282.46%29%7D%7B101.77592%7D%2C%5C%20%5Cdfrac%7B%2868%29%282.46%29%7D%7B41.71347%7D%20%5C%20%5Cright%20%29%5C%5C%5C%5C%3D%5Cleft%20%28%201.64361078731%2C%204.01021540524%5Cright%20%29%5Capprox%281.64%2C%5C%204.01%29)
Hence, the 99% confidence interval for the population variance of the weights of all axles in this factory is (1.64,4.01).
Answer:
y intercept: (0, 0.4)
x intercept: (0.3, 0)
Step-by-step explanation:
This is all based on observation. If you look at the graph, you see that the x intercept is (0.3, 0) and the y intercept it (0, 0.4)
Answer:
Nothing
Step-by-step explanation:
You can't divide by zero