Range of Study Hours

A statistics teacher collected data on the number of hours her students studied in a week. The results of the survey are as follows:

• 3 hours
• 5 hours
• 4 hours
• 6 hours
• 4 hours
• 3 hours
• 8 hours
• 4 hours
• 6 hours
• 7 hours
• 2 hours
• 5 hours
• 3 hours
• 6 hours
• 4 hours
• 5 hours
• 7 hours
• 5 hours
• 8 hours
• 2 hours
• 6 hours

The teacher is interested in understanding the distribution of study hours by calculating the range of the data. What is the range of hours studied?