Collecting Displaying Data Data Tables Numerical quantitative data

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 1 2 3 4 5 Average Variable 1 Variable 2 Variable 3

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

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