Chapter 5: Standard scores and normal curve

1. Standard score (z-score)

• Definition

• . Computation for the population:

• Computation for the sample:

• C. Properties

2. Normal Distribution

• A. Computation of an area

• B. Normal Curve Table A

3. Calculations using the normal curve

A. Given a raw score, what percent of scores fall below that score?

i. Draw diagram--draw a normal curve and draw on it

a. the mean,

b. the raw score

c. an arrow with the direction

ii. Use the Z-score equation, to solve for z.

iii. Go to table to find area under curve.

4. Given a percent area, what is the raw score?

1. Draw diagram

2. Use table to find z vs. Area (cuz we know it)

3. Use equation to solve for X

Statistics