Question
1.A study was conducted that compared the time to awaken from a general anesthetic for ten orthopedic patients that had two knee replacements done in
1.A study was conducted that compared the time to awaken from a general anesthetic for
ten orthopedic patients that had two knee replacements done in two separate surgeries,
with the anesthetic differing for surgeries on the first knee and the second knee. The
anesthetic used for the first knee replacement was the same for all 10 patients, as was the case for the second knee replacement in the patients. All surgeries were performed by the same surgeon. The study was interested in determining whether there was a difference in the time to awaken following surgery for the two different anesthetics. The data for the
ten patients are provided in the table below. Use these data to answer the question below
the table.
Patient
Anesthetic 1 (1st Knee)
Time to awaken (in min)
Anesthetic 2 (2nd Knee)
Time to awaken (in min)
1
142
138
2
140
136
3
144
147
4
144
139
5
142
143
6
146
141
7
149
143
8
150
145
9
142
136
10
148
146
a.Conduct the appropriate statistical test to determine if there is a difference in the time to awaken from the anesthetics for the two different types of anesthetic. Assume =0.05. Show all calculations.[2 Marks]
b.What is the p-value for the test you performed in question a above? Does this p-value support the conclusion you reached in question a? Explain.[2 Marks]
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