Graduate
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Salary
$106,900
$93,700
$230,400
$113,200
$97,300
$140,000
$150,700
$120,000
$89,900
$166,200
$171,500
$136,500
$90,900
$76,100
$84,700
$142,700
$60,400
$58,900
$146,000
$132,700
$71,500
$127,800
$155,300
$92,800
$96,900
$79,600
$102,600
$105,300
$198,600
$147,100
$106,700
$184,700
$176,000
$239,000
$121,000
$97,600
$77,900
$77,300
$146,300
$96,800
$130,400
$73,500
$197,000
$107,700
$59,100
$118,400
47
48
49
50
51
52
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54
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81
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84
85
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91
92
93
$70,200
$159,100
$182,100
$96,500
$97,100
$224,900
$129,800
$122,300
$117,500
$77,500
$153,800
$147,500
$110,900
$136,300
$155,900
$97,800
$148,000
$167,600
$113,700
$112,100
$93,400
$119,100
$65,100
$117,700
$145,500
$120,300
$142,400
$119,400
$98,600
$105,000
$88,300
$98,800
$200,100
$98,500
$107,100
$86,600
$100,300
$137,400
$108,400
$104,200
$57,300
$148,900
$118,100
$105,400
$57,800
$217,100
$104,100
94
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98
99
100
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128
129
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136
137
138
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140
$117,700
$130,800
$102,400
$199,300
$60,300
$152,800
$168,200
$169,500
$104,500
$132,900
$109,500
$129,700
$136,200
$153,500
$90,300
$148,300
$85,800
$134,400
$133,500
$70,900
$112,500
$168,500
$159,100
$93,000
$138,300
$99,200
$62,000
$111,200
$124,200
$98,400
$122,600
$114,500
$153,100
$142,000
$168,800
$112,100
$141,400
$140,900
$112,800
$247,900
$114,400
$53,000
$124,500
$127,400
$111,400
$99,800
$109,200
141
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171
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183
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185
186
187
$82,400
$112,600
$100,600
$145,600
$106,700
$172,900
$170,200
$146,600
$228,400
$124,300
$126,200
$119,100
$120,800
$93,000
$123,800
$123,900
$70,500
$86,300
$73,200
$129,600
$116,500
$83,100
$95,600
$70,900
$126,900
$120,800
$141,300
$124,700
$139,400
$57,600
$119,000
$158,400
$120,500
$124,900
$217,000
$126,300
$136,400
$109,800
$241,600
$91,300
$148,100
$251,500
$103,800
$110,600
$192,400
$113,900
$161,800
188
189
190
191
192
193
194
195
196
197
198
199
200
$147,500
$79,000
$117,500
$136,100
$142,300
$118,300
$128,800
$179,200
$118,900
$157,800
$147,600
$41,900
$141,000
The data file contains salaries of 200 recent graduates from a (fictional) MBA program (see data sheet).
1. Is this a sample or a population? (10 pts)
2. Construct a frequency distribution. (hint: use the method discussed in week 1 lecture to find k,m). (30 pts)
3. Draw a histogram. (20 pts)
4. What salary level is most indicative of those earned by students graduating from this MBA program? (20 pts)
5. As an admissions officer of this MBA program, how would you use these findings to market the program to prospective stu
gram to prospective students? (20 pts)
Consider a sample:
4
1
2
2
1
2
2
1
0
3
1. Determine the sample mean and standard deviation. (20 pts)
2. Develop a 95 percent confidence interval for the population mean. (50 pts)
3. Interpret the result. (20 pts)
4. Explain why the t-distribution is used as a part of the confidence interval. (10 pts)
Employee
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Exercise
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Cholesterol
176
200
198
204
197
185
200
211
206
213
187
223
173
194
175
179
194
163
177
183
263
204
165
187
184
174
207
191
191
222
193
196
222
183
165
174
209
194
213
179
175
158
196
183
182
204
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Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
184
187
204
174
186
192
171
222
174
196
193
183
236
201
232
166
164
207
166
208
205
215
190
178
192
234
218
249
180
161
180
184
180
166
184
167
163
172
207
193
211
177
174
178
214
182
195
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140
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
No
202
197
186
162
187
185
190
174
223
178
200
197
201
180
205
230
169
256
210
187
212
209
218
208
181
211
231
188
192
164
195
210
176
213
200
177
201
199
204
198
186
200
210
206
211
189
217
141
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172
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176
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180
181
182
183
184
185
186
187
No
No
No
No
No
No
No
No
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No
No
No
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No
No
No
No
172
195
175
179
195
235
178
184
225
204
234
188
185
174
207
193
192
217
194
197
217
184
196
216
192
180
195
226
218
204
183
157
161
189
164
171
189
216
168
177
212
198
216
183
179
160
200
188
189
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193
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201
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234
No
No
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No
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No
No
No
187
200
208
202
191
208
192
190
196
175
224
178
200
197
201
233
205
231
169
193
183
198
184
181
187
240
208
159
191
188
192
165
196
210
224
214
200
177
201
199
205
185
169
187
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206
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No
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No
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No
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No
No
No
No
No
No
No
No
189
218
173
182
176
232
195
238
227
163
226
191
237
173
166
170
204
176
190
213
192
181
213
182
180
186
180
248
182
190
187
191
162
195
209
175
212
217
176
200
215
229
197
186
200
165
235
282
283
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285
286
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300
No
No
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No
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No
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No
No
No
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No
210
188
172
171
194
174
178
194
231
177
209
189
175
191
217
211
200
178
228
A company is concerned with the high cholesterol levels of many of its employees. To help combat the problem, it opens an e
After a year, it chooses a random 100 employees who claim they use the facility regularly, and another 200 who claim they d
shown in the sheet 1.
1. Does the sample evidence suggest that the cholesterol level is not different between group of using exercise facility and gr
2. Could you conclude from a such study that the exercise causes low cholesterol? Why or why not?
(50pts)
(50pts)
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