Data Tables and Graphs A data table is

Data Tables and Graphs

�A data table is a good way to collect data as well as share data with others � In a data table your IV goes on the left side and your DV goes on the right column(s) �*this is different from graphs* �Example: What’s the IV, What’s the DV? Type of Rest Test 1 2 3 Well-rested Students 95 90 91 Tired Students 77 82 75

� Graphs allow you to share information in a way that is easy to understand � The graphs you will use most often in Biology are bar graphs, line graphs and double line graphs

- A TITLE that explains what is being shown on the graph Ex: Student Test Scores �A title is NOT a question! �A title should be descriptive

� EQUAL INTERVALS! � Depending on your data you may count by 1, . 5, 100, 10, 000, etc…MUST BE EQUAL! � Start with 0 and end above your last data point! For example, if your data went from 23 to 96 you would probably start with ___ and end with ____ � Find your range by subtracting the lowest from highest numbers (after you decide where you want to start and end) � Divide by 10 to find your intervals

� LABELED X AND Y AXES � You must tell what is being show on each axis, as well as what units where used to measure � Remember the DV must be on the y axis and the IV must be on the x axis

� Bar graphs are used when COMPARING data � Each bar should be the same width � Bars can touch when grouping data

� You will use these graphs the most in Biology � These graphs show change over TIME (minutes, seconds, days, years, etc. ) � Intervals (spaces) on both the x and y axis must be equal! � Plot your data using dots, then NEATLY connect the dots to create a line

� This kind of graph is always on the EOC! � I’ve even heard rumor of three line graphs. � It is just like a line graph, except you add another line showing another set of data � Plot one line completely, then plot the next � Your second line should have a different color, point shapes, etc. � Make a key showing what each line represents