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

1.0

step-by-step explanation:

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°