Cholesterol	BPStart	BPEnd	Treatment
160	129	132	Light
255	165	158	Placebo
195	119	114	Strong
222	157	162	Strong
222	113	109	Placebo
196	122	119	Placebo
200	126	125	Strong
200	107	103	Light
140	155	147	Strong
162	112	114	Placebo
131	106	117	Strong
254	104	103	Strong
194	155	153	Light
215	129	137	Strong
170	113	108	Light
175	101	103	Placebo
196	125	131	Strong
169	114	122	Strong
180	112	117	Strong
153	149	158	Strong
201	151	162	Strong
155	139	128	Placebo
192	105	101	Light
150	99	105	Light
217	103	112	Light
211	148	144	Strong
252	116	121	Strong
232	161	153	Light
222	123	125	Light
213	118	121	Light
159	120	119	Light
226	156	153	Placebo
203	153	150	Light
185	98	104	Light
189	159	153	Placebo
221	145	149	Strong
179	95	100	Light
129	132	130	Placebo
167	83	89	Strong
225	109	114	Placebo
234	137	127	Light
190	130	133	Light
153	139	145	Strong
193	143	144	Strong
141	121	121	Strong
160	133	122	Placebo
140	102	92	Light
152	102	97	Placebo
178	94	94	Placebo
152	87	85	Strong
164	93	97	Light
201	148	151	Placebo
126	118	128	Strong
194	126	114	Placebo
173	121	114	Strong
190	86	87	Strong
212	153	147	Light
157	111	104	Light
198	95	89	Placebo
207	122	124	Placebo
203	131	131	Placebo
210	164	169	Light
202	103	95	Placebo
232	130	134	Light
188	118	122	Placebo
256	156	153	Light
131	103	106	Light
154	94	96	Placebo
225	132	141	Placebo
193	158	165	Strong
216	129	130	Light
128	132	124	Placebo
198	128	125	Placebo
182	129	121	Strong
206	124	135	Strong
161	111	112	Light
245	132	130	Placebo
139	120	127	Placebo
152	100	100	Light
234	114	127	Strong
160	121	123	Light
167	113	103	Strong
253	129	126	Strong
202	119	120	Strong
154	139	147	Placebo
171	116	117	Placebo
227	108	109	Strong
192	115	111	Placebo
190	154	153	Strong
206	134	145	Strong
215	96	98	Placebo
154	116	113	Light
182	102	108	Placebo
226	117	130	Strong
158	121	129	Strong
204	114	113	Strong
205	134	142	Strong
161	121	131	Strong
240	120	112	Light
155	101	93	Light
209	146	138	Strong
129	100	115	Strong
206	90	84	Placebo
231	112	111	Placebo
238	142	139	Light
243	98	100	Placebo
133	138	154	Strong
230	127	125	Light
192	134	130	Placebo
221	154	159	Placebo
161	85	89	Light
200	146	148	Light
177	94	90	Light
187	120	121	Placebo
229	145	148	Light
207	134	135	Light
167	139	138	Strong
224	132	135	Light
155	140	143	Placebo
128	95	100	Light
194	110	109	Light
207	127	122	Strong
209	111	114	Strong
178	159	150	Placebo
186	92	93	Strong

Use the dropdown menu to choose the Pharmaceuticals Trial data set. The variable descriptions are as follows:

• No.: An arbitrary identification number assigned to each patient in the drug trial
• Cholesterol: The patient's cholesterol level at the beginning of the drug trial period
• BPStart: The patient's systolic blood pressure before treatment began
• BPEnd: The patient's systolic blood pressure at the end of the 6-week treatment period
• Treatment: The type of treatment or dosage the patient received

Choose a sample size of 125, and inspect your data. Which of the following correctly describes an observation in this data set?

multiple choice

• An increase in blood pressure during the study
• A type of drug
• A blood pressure measurement
• A patient
• The set of 125 patients in the study