Problem
A group of high school seniors were asked how many hours of sleep they get per night. Below is their response. Use this data to frequency table, and include relative and cumulative frequency as well. Upon completion of the table, frequency and relative frequency histogram. Use the table and histograms to answer the following questions.
4, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7,7 8, 8, 9
1. How many students get at least the recommended eight hours of sleep?
2. How many students get less than seven hours of sleep?
3. How many students get exactly five hours of sleep?
4. What proportion of students get less than the recommended eight hours of sleep?
5. What proportion of students get seven or eight hours of sleep?
6. What is similar about the frequency histogram and the relative frequency histogram?
7. What is different about the frequency histogram and the relative frequency histogram?
The same group of seniors displayed their last math exam scores. Display these results in a stem and leaf plot.
42, 47, 56, 58, 61, 63, 68, 74, 75, 79, 79, 80, 82, 83, 87, 87, 87, 87, 89, 90, 92, 92, 94, 99, 100