Answer:
A is your answer bwttwwwwwww
Step-by-step explanation:
X is 12, I did this question to someone else before
Answer:
All ordered pairs with the same x value
Step-by-step explanation:
A vertical line can be represented by the equation x=k for some value k. So any pair with x value equal to k satisfies the equation and is thus in the set
Answer:
B and D
F also has vertical angles however they haven't been numbered like the others
Answer:
The 90% confidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.369, 0.431).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.
![\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}](https://tex.z-dn.net/?f=%5Cpi%20%5Cpm%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D)
In which
z is the zscore that has a pvalue of
.
For this problem, we have that:
![n = 675, \pi = \frac{270}{675} = 0.4](https://tex.z-dn.net/?f=n%20%3D%20675%2C%20%5Cpi%20%3D%20%5Cfrac%7B270%7D%7B675%7D%20%3D%200.4)
90% confidence level
So
, z is the value of Z that has a pvalue of
, so
.
The lower limit of this interval is:
![\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4 - 1.645\sqrt{\frac{0.4*0.6}{675}} = 0.369](https://tex.z-dn.net/?f=%5Cpi%20-%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D%20%3D%200.4%20-%201.645%5Csqrt%7B%5Cfrac%7B0.4%2A0.6%7D%7B675%7D%7D%20%3D%200.369)
The upper limit of this interval is:
![\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4 + 1.645\sqrt{\frac{0.4*0.6}{675}} = 0.431](https://tex.z-dn.net/?f=%5Cpi%20%2B%20z%5Csqrt%7B%5Cfrac%7B%5Cpi%281-%5Cpi%29%7D%7Bn%7D%7D%20%3D%200.4%20%2B%201.645%5Csqrt%7B%5Cfrac%7B0.4%2A0.6%7D%7B675%7D%7D%20%3D%200.431)
The 90% confidence interval for the population proportion of new car buyers who prefer foreign cars over domestic cars is (0.369, 0.431).