Recently, the Centers for Disease Control and Prevention estimated 9.4% of children under the age of 18 had asthma. They reported the standard error to be 0.35%. Assuming that the sampling distribution is symmetric and bell-shaped, find a 95% confidence interval.
A) 8.7% to 10.1%
B) 9.1% to 7.8%
C) 8.4% to 10.5%
D) 8.1% to 10.8%

Question

Quizplus · Accepted Answer

0.094 ± 2 ? 0.0035 ? 0.094 ± 0.007 ? 0.087 to 0.101 (or, 8.7% to 10.1%)

Recently, the Centers for Disease Control and Prevention Estimated 9