1. An administrator at Milpitas High School would like to estimate, with 95% confidence, the percentage of students who will enroll in summer courses. Based on a random sample of data that is gathered, a 95% confidence interval is constructed. The interval is 22% 8%. If there are 2000 students who attend Milpitas High School, and if the administrator is estimating, with 95% confidence, that 22% 8% of these students will enroll in summer classes, this means the possible number of students who might enroll in summer courses is from

1. 120 to 760 students.
2. 195 to 430 students.
3. 400 to 480 students.
4. 300 to 900 students.
5. 280 to 600 students

1. A 90% confidence interval is constructed in order to estimate the proportion of adults who own an iPhone. The resulting interval has a margin of error of 0.036. Which of the following would be the margin of error for a 95% confidence interval based on the same sample of data?

A. 0.022

B. 0.043

C. 0.056

D. 0.018

E. It is impossible to answer this question without more information.