His answer and process are both incorrect because he needs to divide 10^-4 by 10^-3 to get 4*10^-1 and the answer is .025 times larger.
Answer:
Step-by-step explanation:
- The # in front of x will be the number that hits on the y-axis
- The # after x or the slope, ex: y = -1/2x + 2, is how much you move to hit the next point on the graph
- 2 would actually be 2/1 so move up 2 and right 1 (if the number or fraction is negative then go up and to the left
- So y = -2x - 1/2, negative slope. Start at -2 on y-axis and go up 1 then left 2.
Complete Question
A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie. Among the 500 respondents, 12 % chose chocolate pie, and the margin of error was given as plus or minus 5 percentage points.What values do
, n, E, and p represent? If the confidence level is 90%, what is the value of
?
Answer:
a
is the sample proportion
is the sample size is ![n = 500](https://tex.z-dn.net/?f=n%20%20%3D%20%20500)
is the margin of error is ![E = 0.05](https://tex.z-dn.net/?f=E%20%20%3D%20%200.05)
represents the proportion of those that did not chose chocolate pie i.e ![\r q = 1- \r p](https://tex.z-dn.net/?f=%5Cr%20%20q%20%20%3D%20%201-%20%20%5Cr%20p)
b
![\alpha = 10\%](https://tex.z-dn.net/?f=%5Calpha%20%20%3D%2010%5C%25)
Step-by-step explanation:
Here
is the sample proportion
is the sample size is ![n = 500](https://tex.z-dn.net/?f=n%20%20%3D%20%20500)
represents the proportion of those that did not chose chocolate pie i.e
![\r q = 1- \r p](https://tex.z-dn.net/?f=%5Cr%20%20q%20%20%3D%20%201-%20%20%5Cr%20p)
![\r q = 1- 0.12](https://tex.z-dn.net/?f=%5Cr%20%20q%20%20%3D%20%201-%20%200.12)
![\r q = 0.88](https://tex.z-dn.net/?f=%5Cr%20%20q%20%20%3D%200.88)
is the margin of error is ![E = 0.05](https://tex.z-dn.net/?f=E%20%20%3D%20%200.05)
Generally
is the level of significance and it value is mathematically evaluated as
![\alpha = ( 100 - C )\%](https://tex.z-dn.net/?f=%5Calpha%20%20%3D%20%28%20100%20-%20%20C%20%20%29%5C%25)
Where
is the confidence level which is given in this question as ![C = 90 \%](https://tex.z-dn.net/?f=C%20%3D%20%2090%20%20%5C%25)
So
![\alpha = ( 100 - 90 )\%](https://tex.z-dn.net/?f=%5Calpha%20%20%3D%20%28%20100%20-%20%2090%20%20%29%5C%25)
![\alpha = 10\%](https://tex.z-dn.net/?f=%5Calpha%20%20%3D%2010%5C%25)
90,000,000+300000+400000+700000+2000+800+10
Answer:
-7x² + x + 3
I do not know if you need to show work but I just knew this