Normal Distribution

Question 1

What are properties of the normal distribution

Answer 1

1) Shape is a bell curve

2) The curve is symmetrical about the the population mean

3) The area under the curve represents the probability

4) Approximately 2/3 of data lie within 1 standard deviation of the mean

5) Approximately 96% of data lie within 2 standard deviation of the mean

6) Almost all of the data lie within 3 S.D of the mean

Question 2

What are the steps for standardised form

Answer 2

1) Setup Draw a picture of info given

2) Standardise Write the given no in standard form

3) Sketch the same picture for Z-N (0,1)

4) Solve the resulting equation