<u>Confidence interval for population proportion is </u>
<u>sample proportion +/- confidence coefficient*standard error of p </u>
<u>Sample proportion = p = x/n = 180/300 = 0.6 </u>
<u>Confidence coefficient is the critical value of z for 95% confidence level = 1.96 </u>
<u>Standard error of p = sqrt [p*(1-p)/n] </u>
<u>= sqrt [0.6*0.4/300] </u>
<u>= 0.0283 </u>
<u>The CI is </u>
<u>0.6 +/- 1.96*0.0283 </u>
<u>0.6 +/- 0.055 </u>
<u>lower boundary is 0.6-0.055 = 0.545 </u>
<u>upper boundary is 0.6+0.055 = 0.655 </u>
<u>The CI is (0.545, 0.655)</u>
The correct answer is A.6
Answer:
B. 0; YES
Step-by-step explanation:
just took the quiz !
Answer:1.03
Step-by-step explanation:
Answer:
1/2 or 0.5 is the correct answer of this question
