THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 42

Essay

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A chemistry class at a university in the Midwest has 450 students.The final examination is optional - it can raise,but not lower,a student's grade.Of a random sample of 100 students,40 indicated that they would take the final examination.
-Find a 90% confidence interval for the proportion of students intending to take the final examination.

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