Calculating percentages from z scores
- 2. Finding Normal Percentiles • You can find a percentile using the Normal Density Curve • First calculate the z-score • You find the percentile using a z- score either from a table or a calculator. • Using the table – see video • Using the calculator – see video
- 3. Finding the percent of data between 2 z-scores • Calculate each z-score • Calculate the percentile value for each z-score • Subtract the percentile values to find the percent of data between the 2 z- scores