Calculate hourly averages - Total all the columns together to get a total number of seconds of nursing for all the hours observed on that day. Then, divide this sum by the total number of hours of observation. Repeat the process for the second calf. Create graphs - Direct students to draw the x and y axis on graphing paper. When all data points are entered on the graph, direct students to connect the marks to show the trend.
Students can either create separate graphs for each calf or graph data for both calves on one paper.
Make sure to use different colors for each calf. Compare, interpret, and analyze - Ask questions to facilitate analysis. Although the students' graph will not be identical, the trend and curve of their graphs should be similar to the norm. Assessment Have students write a short summary in which they analyze the nursing data of the two dolphin calves and compare them to the norm. Students can set up trials with their pets to record data on the length of eating time and the selection of food location.