The people at the Internal Revenue Service (IRS) are always looking for ways to improve the wording and format of its tax return forms. Three new forms have been developed recently. To determine which, if any, are superior to the current form, 120 individuals were asked to participate in an experiment. Each of the three new forms and the currently used form were filled out by 30 different people. The amount of time (in minutes) taken by each person to complete the task was recorded. (XR14-10) 

a. What conclusions can be drawn from these data? 

b. What are the required conditions for the test conducted in Part a? 

c. Does it appear that the required conditions of the test Part a are satisfied?

Form 1	Form 2	Form 3	Form 4
23	88	116	103
59	114	123	122
68	81	64	105
122	41	136	73
74	108	99	87
90	92	156	81
70	52	175	120
87	54	93	169
155	103	77	130
120	50	88	56
124	135	91	101
103	76	118	143
54	143	86	106
90	124	164	129
124	151	101	104
80	96	74	169
69	76	124	69
123	128	137	76
76	60	69	55
71	127	136	138
94	109	127	122
167	122	135	139
69	88	97	138
105	109	103	132
98	90	86	99
73	56	121	64
79	105	98	89
61	64	59	128
121	127	91	127
56	104	61	161

Answer rating: 100% (QA)

aFrom these data it can be concluded that Form 1 is the most efficient form ... View the full answer