Collecting & Displaying Data

Data Tables Numerical (quantitative) data organized in rows and columns The specific independent variables are listed The number of trials are listed Blanks are left for the data (dependent variable) to be filled in

Title Describing the Data Trial Variable 1 Variable 2 Variable 3 1 2 3 4 5 Average

Analyzing the data Reduce the data Do something to make the amount of data smaller Central tendencies Mean (average) Median Mode Range frequency

Analyzing the data Graph the data Lets us see trends, patterns, relationships, comparisons Bar graphs Let us compare data Line graphs Lets us see trends or changes

This shows a comparison of types and amount of trash on a beach. Bar graph This shows a comparison of types and amount of trash on a beach.

Line graph This shows how the grade point average has been changing over several years. The trend is an increase in GPA.

Scatter plot Positive Correlation An increase in the variable on the X-axis is associated with an increase in the variable on the Y-axis

Scatter plot Negative Correlation An increase in the variable on the X-axis is associated with an decrease in the variable on the Y-axis

Scatter plot No Correlation Random data points – there is no association between the variables