Question

Population 1 Female weights	Population 2 male weights
128	190
142	145
130	150
133	127
195	165
166	155
112	155
180	180
180	156
155	188
144	220
140	154
143	200
110	210
160	270
125	250
130	180
150	250
145	240
180	170
175	150
108	155
200	195
151	210
170	155
141	165
200	145
185	190
142	234
125	205
130	151
240	153
160	172
120	200
210	130
220	210
112	190
160	145
120	155
146	178
150	175
148	140
165	265
100
160
130
154
140
125
118
168
147
150

1. Determine the sample size n1 and the sample size n2 from the data file. Calculate x bar 1 and x bar 2 and also to calculate s1 and s2.
2. Let μ1 be the population mean for population 1 and let μ2 be the population mean for population 2. Calculate a 99.9% Confidence Interval for μ1-μ2 by hand.
3. Calculate a 95% Confidence Interval for μ1-μ2 by hand.
4. Calculate a 90% Confidence Interval for μ1-μ2 by hand.
5. Calculate a 99.9% Confidence Interval for μ1-μ2 by hand.

Answer 1

801 저드 ΣΧι 53 £23 4p3 M2 66 00 5. 2) ら3 2 ,, çに3 5-6276 2 n-1 33199.0g l 2 LA u2 151. 283 181.9302t tg4 0.0012693) (23-150) 2 52 4 3 "、I (-30.6472ー3.3970 x 6.5083 30.6472-22.1013 .7491 . -g. 957. C. T 30 6472 + t94, 0.05 x 6.50 63

-30.6472土1:9855 X S-5063) 42-56.ら4 一17 .. 72 89 、 30.6472 t tg4 0.1 x6.SO S3 2 -80. . 6, 472 19-8082 )