Table 2
Class interval: 26-30, 21-25, 16-20, 11-15, 6-10, 1-5
frequency: 4, 5, 8, 6, 8, 5
For item 12-15, use table 2 grouped frequency
12. What is the class boundaries containing the lowest frequency?
a. 10.5-15.5 b. 25.5-30.5 c. 15.5-20.5
13. What is the total frequency?
a. 30 b. 36 c. 34
14. Which class interval has the most occurred frequency?
a. 6-10 and 11-15 b. 5-10 and 16-20 c. 6-10 and 21-25
15. What is the size of the class interval?
a. 4 b. 5 c. 0.5