Question

The prices of some videogames in United States is listed below.

66	74	84	87
68	76	85
70	81	85

1. Construct a group frequency distribution using 4 classes. (3 points)

Class Limits	Class Boundaries	Frequency	Relative Frequency (Round to two decimal places)
-	-
-	-
-	-
-	-

2. Construct a cumulative frequency distribution with the ages of some presidents during their inauguration. (3 points)

Class Boundaries	Cumulative Frequency	Cumulative Relative Frequency (Round to two decimal places)
less than
less than
less than
less than
less than

Answer 1

1.

Class interval	Class Boundaries	Frequency	Relative frequency
66 - 71	65.5 - 71.5	3	3 / 10 = 0.30
72 - 77	71.5 - 77.5	2	2 / 10 = 0.20
78 - 83	77.5 - 83.5	1	1 / 10 = 0.10
84 - 89	83.5 - 89.5	4	4 / 10 = 0.40
Total	-	10	1.00

2.  

Class Boundaries	Cumulative Frequency	Cumulative Relative Frequency
Less than 65	0	0.00
Less than 71	3	0.30
Less than 77	5	0.50
Less than 83	6	0.60
Less than 89	10	1.00