Class 3: Normal Distribution

Question 1

3 properties of the normal distribution

Answer 1

1. Bell shaped curve, symmetrical around the mean
2. Relative area of 2 designated points is always the same, regardless of the size of the mean and the standard deviation
3. Defined by 2 parameters: mean and standard deviation

Question 2

The z score

Answer 2

Z = (x - u)/sig

Z = (value - mean) / standard deviation

Question 3

Gives the area of the graph under the bell-shaped curve

Answer 3

Z score (ie. z of 1.61 = 0.4463 = 44.63%)