20250519 Example 9.3.1 hypothesis test for two means

	A	B
1	Cholesterol Level of Heart Attack Patients	Cholesterol Level of Healthy Individual
2	270	196
3	236	232
4	210	200
5	142	242
6	280	206
7	272	178
8	160	184
9	220	198
10	226	160
11	242	182
12	186	182
13	266	198
14	206	182
15	318	238
16	294	198
17	282	188
18	234	166
19	224	204
20	276	182
21	282	178
22	360	212
23	310	164
24	280	230
25	278	186
26	288	162
27	288	182
28	244	218
29	236	170
30		200
31		176
32
33	Mean, x1-bar	Mean, x2-bar
34	253.93	193.13
35	S1: Sample SD	s2: sample sd
36	47.71049156	22.30004381
37
38	input
39	stdev.s (all)	stdev.s (all)
40
41	n1=28	n2=30
42
43	p value<a
44	0.000001057<0.01
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