20.1. Definition of Normal Distribution

Try these first

1. 1.

   What is the shape of the Normal Distribution?

   Hint

   Think about how it looks on a graph.

2. 2.

   Define Mean in the context of Normal Distribution.

   Hint

   It's the center around which data clusters.

3. 3.

   What shape does a Normal Distribution have?

   • Bell-shaped
   • Square-shaped
   • Linear

   Hint

   Visualize it.

4. 4.

   Is the mean equal to the median in a Normal Distribution?

   • True
   • False

   Hint

   Think about symmetry.

5. 5.

   If the test scores of a class are normally distributed with a mean of 75 and a standard deviation of 10. What is the z-score for a score of 90?

   Hint

   Use the Z-score formula.

6. 6.

   A dataset is normally distributed with a mean of 100 and standard deviation of 15. Calculate the probability that a randomly selected value is greater than 115.

   Hint

   What does the z-table tell you about values above your Z-score?