Normal Distribution

Question 0

What is a normal curve?

Answer 0

• Bell shaped
• Symmetrical, therefore the mode, median and mean all lie on the line of symmetry
• Width of curve shows how spread out the distribution is

Question 1

Does a normal curve display?

Answer 1

Naturally occurring distributions, e.g. Men’s height or childrens shoe sizes

Question 2

What does a normal table do?

Answer 2

Shows the exact area under curve to the left of z, represented by P(Z<z) or the greek symbol phi(z)

Question 3

How do we find values to the right of z? P(Z>z)?

Answer 3

1 - value to the left