1. Data Analysis Qualitative Data Data that when collected is descriptive in nature: Eye colour, Hair colour Quantitative Data Data that when collected is numerical: Continuous data is measured on a scale from zero to infinity with no breaks Discrete data is collected a count

2. Analysis of data Qualitative data Frequency Frequency % Quantitative data Stem and Leaf chart Frequency Chart

3. Data Analysis Qualitative Data Frequency Quantitative Data Measure of central tendency Mean Median

4. Data Analysis Frequency chart as a bar chart Frequency chart as a pie chart mode Quantitative Data Measure of spread Range IQR (interquartile range) mode

5. Data Analysis Qualitative Bar Chart Pie Chart Quantitative Data Charts ad Graphs Box and Whiskers Histogram X-Y Scatter graph Line graph

6. Box and Whisker plot

7. Histogram

8. X-Y Scatter graph

9. Bar Chart

10. Pie Chart

11. Definitions Mean: The average (total of measurements divided by number of samples) Median: middle number in an ordered set Mode: most common number Range: High value to value LQ: start of bottom 25% of data points UQ: start of top 25% of data points IQR: difference between UQ and LQ