Solutions Statistics

Find the evaluation score (E. Score) confidence intervals for the following two departments: Departm

Question: Find the evaluation score (E. Score) confidence intervals for the following two departments: Department 1 and Department 4 combined.

Find the confidence interval at the 95% level. Use $\sigma $ = 6.06 and = 17.625

The Data

ID #	Dept.	Ethnicity	Gender	Weight	Age	Salary ($)	Vacation Hrs.	Absences	E. Score	P. Score
694	3	F	F	252	18	69,380	300	16	24	94
261	3	W	F	178	21	39,986	60	22	22	90
138	2	B	F	132	21	40,000	138	34	15	86
222	2	B	F	162	22	32,000	159	32	17	76
556	5	B	M	219	24	31,000	120	70	19	98
300	1	W	F	192	24	84,000	120	18	18	80
58	3	H	F	110	25	12,775	60	0	14	94
169	1	W	M	138	26	25,594	125	0	21	72
558	5	F	M	220	27	22,000	85	7	16	87
765	4	F	M	271	30	22,697	330	42	17	71
728	3	B	F	270	30	97,424	60	16	22	65
901	2	W	M	310	31	18,000	1292	40	15	71
611	5	W	F	229	31	98,000	85	15	13	84
264	1	H	F	189	31	67,089	125	81	20	70
128	2	B	M	127	31	48,000	444	10	15	91
118	1	W	M	126	31	37,328	85	61	25	84
101	2	A	F	124	32	66,000	336	47	21	96
605	3	H	F	226	34	27,082	60	24	10	76
945	5	W	F	399	35	14,000	120	15	8	75
721	4	H	M	255	35	31,466	64	9	18	80
852	1	F	M	288	37	51,243	85	40	1	72
207	3	A	F	159	37	54,101	300	49	15	79
811	5	W	M	287	38	35,000	325	43	10	86
508	5	F	M	217	38	17,000	300	45	7	77
927	4	W	M	315	41	40,718	212	15	15	97
17	4	F	F	97	41	83,331	534	28	11	88
421	5	H	M	212	42	11,000	60	78	1	92
327	2	W	F	204	43	214,000	317	90	23	74
507	4	W	M	215	44	43,847	58	0	12	80
204	3	H	M	151	46	80,712	150	34	12	80
325	3	B	F	198	47	86,274	150	17	17	82
206	1	W	F	155	47	15,544	85	85	18	94
333	2	H	M	210	48	26,400	384	0	19	79
727	4	W	M	262	51	15,155	156	0	19	81
496	2	B	F	214	51	15,400	155	39	11	77
233	4	A	M	174	53	29,050	151	0	25	76
971	1	F	M	407	56	43,761	120	21	23	85
301	4	W	M	195	59	73,582	564	110	23	97
877	1	A	M	290	66	12,484	85	28	16	87
906	5	B	F	314	73	91,000	325	12	22	73