CCGPS CA 4.2.1 Example 3
Ms. Scanlon surveys her students about the time they spend studying. She creates a table showing the amount of time students studied and the score each students earned on a recent test. Ms. Scanlon wants to understand the distribution of scores among all the students, and to get a sense of how students are performing and how much students are studying. Find the conditional relative frequencies as a percentage of the total number of students.
- Find the total number of students represented in the table by summing the joint frequencies.
- Divide each joint frequency by the total number of students.
- Insert each conditional joint frequency in a new table set up the same way as the two-way frequency table.