How big a sample? Quiz

Name: ______________________   Date: __________   Score: ____ / 10

10 questions. Calculator allowed. Show your working. steplyclass.com/university-statistics/how-big-a-sample/quiz/

1. 1

   Sample size: 95% confidence, sd 15, error bound 2
   1. A) n = 217
   2. B) n = 216
   3. C) n = 0.9750
   4. D) n = 216.09

2. 2

   Sample size: 90% confidence, sd 10, error bound 2

   Answer: ____________________

3. 3

   Sample size: 99% confidence, sd 12, error bound 3
   1. A) n = 0.9950
   2. B) n = 107
   3. C) n = 106
   4. D) n = 1070

4. 4

   Sample size: 90% confidence, sd 5, error bound 1

   Answer: ____________________

5. 5

   Sample size: 95% confidence, sd 6, error bound 1.5
   1. A) n = 620
   2. B) n = 62
   3. C) n = 0.9750
   4. D) n = 61

6. 6

   Sample size for a proportion: 90% confidence, error bound 0.03

   Answer: ____________________

7. 7

   Sample size for a proportion: 95% confidence, error bound 0.04, p′ = 0.2
   1. A) n = 384
   2. B) n = 385
   3. C) n = 0.8
   4. D) n = 0.9750

8. 8

   Sample size: 95% confidence, sd 2.5, error bound 0.5

   Answer: ____________________

9. 9

   Sample size for a proportion: 99% confidence, error bound 0.04
   1. A) n = 1036
   2. B) n = 0.5
   3. C) n = 0.9950
   4. D) n = 1037

10. 10

    Sample size for a proportion: 95% confidence, error bound 0.02

    Answer: ____________________