Acertain survey conducted had a population proportion of at most 22% for people who agreed. what is the confidence level if 20% of the people sampled agreed, and the standard error of the proportion is ±1%?

The formula for the population proportion is:

n = p ± Zc 

where p = confidence level = 0.2

 n = proportion = 0.22

= standard error = 0.01

Finding for Zc:

.20+(.01)=.22

Zc = 2

Referring to Critical value table for standard normal curve, a Zc value of 2 is equivalent to 95% Confidence Level.

95% Confidence Level

for the friend request.

when a figure, such as triangle (xyz) is reflected over the line y = x to create x'y'z' the x-coordinates and y-coordinates of the original image (pre-image) will be reversed for the image. (e.g., (x, y) > (y, x)) this means that the pre-image position of the x- and y-coordinates switch places which in turn provides a mirror like image of the original xyz.  

i notice that when i draw a line segment from x to x', that the points are parallel from each other -- they are exactly across from each other and do not intersect with any other points.  

yes, think i would see the same characteristic if you drew the line segment connecting y with the reflecting line and then y' with the reflecting line because of the essence of reflections. because it is a mirror image, each point was effected the same way which leads me to conclude that they same would apply to y and y'.

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!