3. A political campaign manager wants to test the effectiveness of a new advertisement featuring Candidate X The campaign manager takes a random sample of 300 voters before the ad goes on air and another random
sample of 250 voters afterwards. 158 of the 300 voters in the "before" sample say they support Candidate X
and 140 voters in the “after” sample say they support Candidate X. If P,= the proportion of all voters who
support Candidate X after the ad is aired and Pe=the proportion of all voters who support Candidate X
before the ad is aired, which of the following is the correct standardized test statistic for H: P.-P. = 0?
0.56 -0.527
0.56 -0.527
(b)
10.56(0.44 0.527(0.473)
0.542(0.458) 0.542(0.458)
250
300
250
300
0.56 -0.527
0.56 -0.527
(c) == -
(d)
0.542(0.458)
0.56(0.44) 10.527(0.473)
550
250
300
0.56 -0.527
(e) ==
0.56 0.527
250 300

  the correct choice is marked

step-by-step explanation:

the first two graphs show multiple turning points. the last graphs matches the description in every detail.

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!

the first one

step-by-step explanation:

just id the test.

there were a lot of them but the first one to pop up on a google search was bts