Answer:
a) the sample proportion planning to vote for Candidate Y is 
b) the standard error of the sample proportion is ≈ 0.024
c) 95% confidence interval for the proportion of the registered voter population who plan to vote for Candidate Y is (0.353,0.447)
d) 98% confidence interval for the proportion of the registered voter population who plan to vote for Candidate Y is (0.344,0.456)
Step-by-step explanation:
a) The sample proportion planning to vote for Candidate Y is:

b) The standard error of the sample proportion can be found using
SE=
where
- p is the sample proportion planning to vote for Candidate Y (0.4)
- N is the sample size (400)
Then SE=
≈ 0.024
c) 95% confidence interval for the proportion of the registered voter population who plan to vote for Candidate Y can be calculated as p±z×SE where
- p is the sample proportion planning to vote for Candidate Y (0.4)
- SE is the standard error (0.024)
- z is the statistic for 95% confidence level (1.96)
Then
0.4±(1.96×0.024)=0.4±0.047 that is (0.353,0.447)
d) 98% confidence interval is similarly
0.4±(2.33×0.024)=0.4±0.056 that is (0.344,0.456) where
2.33 is the statistic for 98% confidence level.
F(-2).....this is basically saying that when x = -2, what is y
so f(-2) = 2
because f(x) is the same as y...but when u have f(-2)....this is saying x = -2 and they are wanting to know what y is....and when x = -2, y = 2....so f(-2) = 2
Lets do this step by step.
1st.) what is 15% as a decimal
15% = 0.15
2nd.) multiply
220 x 0.15 = 33
3rd) we add that 33 and 220 since this its asking for the increase
220 + 33 = 253
Answer = 253
Answer:
(3x - 14) = (2x+ 10) { Because the angles are vertically opposite to each other}
3x-2x= 14+10
x=24