Question

2.32 The following are the grades that 50 students obtained on an accounting test:

73	65	82	70	45	50	70	54	32	75
75	67	65	60	75	87	83	40	72	64
58	75	89	70	73	55	61	78	89	93
43	51	59	38	65	71	75	85	65	85
49	97	55	60	76	75	69	35	45	63

Convert the distribution from classes 30-39, 40-49, 50-59, …, and 90-99 into cumulative “less than” distribution, beginning with “less than 30”.

2.34The following are the miles per gallon obtained with 40 tankful of gas:

24.1	25.0	24.8	24.3	24.2	25.3	24.2	23.6	24.5	24.4
24.5	23.2	24.0	23.8	23.8	25.3	24.5	24.6	24.0	25.2
25.2	24.4	24.7	24.1	24.6	24.9	24.1	25.8	24.2	24.2
24.8	24.1	25.6	24.5	25.1	24.6	24.3	25.2	24.7	23.3

Group these figures into a distribution having the classes 23.0-23.4, 23.5-23.9, 24.0-24.4, 24.5-24.9, 25.0-25.4, and 25.5-25.9.

b) Convert the distribution obtained in part (a) into a cumulative "or more" distribution, beginning with "23.0 or more" and ending with "26.0 or more."

Answer 1