Normal probabilities with the z-table Quiz

Name: ______________________   Date: __________   Score: ____ / 10

10 questions. Calculator allowed. Show your working. steplyclass.com/university-statistics/normal-probabilities-with-the-z-table/quiz/

1. 1

   Normal: P(X < 60), mean 50, sd 10
   1. A) P(X < 60) = 0.08413
   2. B) P(X < 60) = 8.413
   3. C) P(X < 60) = 0.8413
   4. D) P(X < 60) = 1

2. 2

   Normal: P(X < 45), mean 50, sd 5

   Answer: ____________________

3. 3

   Normal: P(X < 112), mean 100, sd 8
   1. A) P(X < 112) = 0.9332
   2. B) P(X < 112) = 93.32
   3. C) P(X < 112) = 9.332
   4. D) P(X < 112) = 1.5

4. 4

   Normal: P(X > 40), mean 50, sd 10

   Answer: ____________________

5. 5

   Normal: P(40 < X < 65), mean 50, sd 10
   1. A) 0.7745
   2. B) 7.745
   3. C) 1.5
   4. D) 0.07745

6. 6

   Normal: P(X > 83), mean 75, sd 6

   Answer: ____________________

7. 7

   Normal: P(X < 34), mean 40, sd 5
   1. A) P(X < 34) = 0.1151
   2. B) P(X < 34) = 0.01151
   3. C) P(X < 34) = 1.151

8. 8

   Normal: P(X < 63.5), mean 60, sd 2.5

   Answer: ____________________

9. 9

   Normal: P(X > 71.2), mean 65, sd 4
   1. A) 1.55
   2. B) 0.0606
   3. C) 0.9394
   4. D) 0.606

10. 10

    Normal: P(X < 480), mean 500, sd 25

    Answer: ____________________