10/26/2019Print Test1/7PRINTABLE VERSIONQuiz 10You scored 49 out of 100Question 1Your answer is CORRECT.The z-score associated with the 96.5 percent confidence interval is a) 2.108b) 1.812c) 1.767d) 2.012e) 2.611f) None of the above

Question 2Your answer is CORRECT.What will increase the width of a confidence interval?

Question 3Your answer is CORRECT.A simple random sample of 64 8th graders at a large suburban middle school indicated that 88% of them areinvolved with some type of after school activity. Find the margin of error associated with a 98% confidenceinterval that estimates the proportion of them that are involved in an after school activity.

Question 4Your answer is INCORRECT.A simple random sample of 100 8th graders at a large suburban middle school indicated that 82% of themare involved with some type of after school activity. Find the 95% confidence interval that estimates theproportion of them that are involved in an after school activity.