Confidence interval for a proportion Quiz

Name: ______________________   Date: __________   Score: ____ / 10

10 questions. Calculator allowed. Show your working. steplyclass.com/university-statistics/confidence-interval-for-a-proportion/quiz/

1. 1

   Calculate 95% confidence interval: 120 of 400 say yes

   Answer: ____________________

2. 2

   Calculate 95% confidence interval: 250 of 500 agree

   Answer: ____________________

3. 3

   Calculate 95% confidence interval: 45 of 100 say yes

   Answer: ____________________

4. 4

   95% confidence interval: 200 of 1000 bike to work

   Answer: ____________________

5. 5

   Calculate 99% confidence interval: 300 of 1000 own a car

   Answer: ____________________

6. 6

   Calculate 95% confidence interval: 421 of 500 have a phone

   Answer: ____________________

7. 7

   Calculate 99% confidence interval: 160 of 400 agree

   Answer: ____________________

8. 8

   95% confidence interval: 642 of 1000 want more parks

   Answer: ____________________

9. 9

   Calculate 99% confidence interval: 1100 of 2000 vote yes

   Answer: ____________________

10. 10

    Calculate 90% confidence interval: 410 of 820 agree

    Answer: ____________________