Clarifying Activity Students collect data, display the data in a table, and then use a scatterplot to graph the relationship between the length of time they can hold their breath and the diameter of a balloon they can fill with one continuous breath. Students then use the trend of the data on the scatterplot to predict how long a person can hold their breath if they can fill a balloon with a diameter of 5 inches with one continuous breath. The student uses statistical procedures to describe data. Clarifying Activity Students collect class data on a topic of interest, such as their favorite type of music, and sort the data into groups such as rap, rock, blues, country. Students construct a circle graph from the data, identifying the entire circle as a representation of the entire class and each appropriately-sized sector of the circle as the representation of the fraction of the class associated with each group of data.
Students use fractions, decimals, and percents and angle measures to construct the circle graph.
Students can extend their data collection to include the entire eighth grade, or the entire school, and use integrated software to design a database and construct a circle graph for the larger set of data. The student evaluates predictions and conclusions based on statistical data. Clarifying Activity Students collect data on how many rolls it takes to roll a 1 with a regular die. Students make conclusions from the data gathered in their small group, then combine their data with other groups' data and revise their conclusions based on the patterns seen in the larger set of data. The student evaluates predictions and conclusions based on statistical data.