Use of herbal medicines. Refer to the American Association of Nurse Anesthetists Journal (February 2000) study on the use of herbal medicines before surgery, given Exercise. The 500 surgical patients that participated in the study were randomly selected from surgical patients at several metropolitan hospitals across the country.
(a) Do the 500 surgical patients represent a population or a sample? Explain.
(b) If your answer was sample in part a, is the sample likely to be representative of the population? If you answered population in part a, explain how to obtain a representative sample from the population.
Exercise
Use of herbal medicines. The American Association of Nurse Anesthetists Journal (February 2000) published the results of a study on the use of herbal medicines before surgery. Each of 500 surgical patients was asked whether they used herbal or alternative medicines (e.g., garlic, ginkgo, kava, fish oil) against their doctor's advice before surgery. Surprisingly, 51% answered ‘‘yes.''
|
MODEL NAME
|
MFG
|
TRANSMISSION
TYPE
|
ENGINE SIZE
(LITERS)
|
NUMBER OF
CYLINDERS
|
EST. CITY
MILEAGE (MPG)
|
EST. HIGHWAY
MILEAGE (MPG)
|
|
TSX
|
Acura
|
Automatic
|
2.4
|
4
|
21
|
30
|
|
Jetta
|
VW
|
Automatic
|
2.0
|
4
|
29
|
40
|
|
528i
|
BMW
|
Manual
|
3.0
|
6
|
18
|
28
|
|
Fusion
|
Ford
|
Automatic
|
3.0
|
6
|
17
|
25
|
|
Camry
|
Toyota
|
Manual
|
2.4
|
4
|
21
|
31
|
|
Escalade
|
Cadillac
|
Automatic
|
6.2
|
8
|
12
|
19
|
(a) Identify the experimental unit for the study.
(b) Identify the variable measured for each experimental unit.
(c) Is the data collected quantitative or qualitative?