In Exercises 9-20, identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster. 9. Aspirin Usage A medical student researches the prevalence of aspirin usage by ques- tioning all of the patients who enter her clinic for treatment. 10. Health Survey Selection The Connecticut Department of Health obtains an alphabet- ical list of 2,537,243 adult Connecticut residents and constructs a pool of survey sub- jects by selecting every 1000th name on that list. 11. Telephone Polls In a Gallup poll of 1059 adults, the interview subjects were selected by using a computer to randomly generate telephone numbers that were then called. 12. Diet A dietitian has partitioned people into age categories of under 18, 18-49, 50-69, and over 69. She is surveying 200 members from each category. 13. Student Drinking Motivated by a student who died from binge drinking, the College of Newport conducts a study of student drinking by randomly selecting 10 different classes and interviewing all of the students in each of those classes. 14. Clinical Trial of Blood Treatment In phase two testing of a new drug designed to in- crease the red blood cell count, a researcher creates envelopes with the names and ad- dresses of all treated subjects. She wants thnerease the dosage in a subsample of 12 subjects, so she thoroughly mixes all of the envelopes in a bin, then pulls 12 of those envelopes to identify the subjects to be given the increased dosage. 15. Sobriety Checkpoint One of the authors observed a sobriety checkpoint at which ev- ery Sth driver was stopped and interviewed.
In Exercises 9-20, identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster. 9. Aspirin Usage A medical student researches the prevalence of aspirin usage by ques- tioning all of the patients who enter her clinic for treatment. 10. Health Survey Selection The Connecticut Department of Health obtains an alphabet- ical list of 2,537,243 adult Connecticut residents and constructs a pool of survey sub- jects by selecting every 1000th name on that list. 11. Telephone Polls In a Gallup poll of 1059 adults, the interview subjects were selected by using a computer to randomly generate telephone numbers that were then called. 12. Diet A dietitian has partitioned people into age categories of under 18, 18-49, 50-69, and over 69. She is surveying 200 members from each category. 13. Student Drinking Motivated by a student who died from binge drinking, the College of Newport conducts a study of student drinking by randomly selecting 10 different classes and interviewing all of the students in each of those classes. 14. Clinical Trial of Blood Treatment In phase two testing of a new drug designed to in- crease the red blood cell count, a researcher creates envelopes with the names and ad- dresses of all treated subjects. She wants thnerease the dosage in a subsample of 12 subjects, so she thoroughly mixes all of the envelopes in a bin, then pulls 12 of those envelopes to identify the subjects to be given the increased dosage. 15. Sobriety Checkpoint One of the authors observed a sobriety checkpoint at which ev- ery Sth driver was stopped and interviewed.
MATLAB: An Introduction with Applications
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Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Identify the types of sampling used: random, systematic, convenience, startified, or cluster.
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In Exercises 9-20, identify which of these types of sampling is used: random, systematic,
convenience, stratified, or cluster.
9. Aspirin Usage A medical student researches the prevalence of aspirin usage by ques-
tioning all of the patients who enter her clinic for treatment.
10. Health Survey Selection The Connecticut Department of Health obtains an alphabet-
ical list of 2,537,243 adult Connecticut residents and constructs a pool of survey sub-
jects by selecting every 1000th name on that list.
11. Telephone Polls In a Gallup poll of 1059 adults, the interview subjects were selected
by using a computer to randomly generate telephone numbers that were then called.
12. Diet A dietitian has partitioned people into age categories of under 18, 18-49, 50-69,
and over 69. She is surveying 200 members from each category.
13. Student Drinking Motivated by a student who died from binge drinking, the College
of Newport conducts a study of student drinking by randomly selecting 10 different
classes and interviewing all of the students in each of those classes.
14. Clinical Trial of Blood Treatment In phase two testing of a new drug designed to in-
crease the red blood cell count, a researcher ereates envelopes with the names and ad-
dresses of all treated subjects. She wants tnerease the dosage in a subsample of 12
subjects, so she thoroughly mixes all of the envelopes in a bin, then puls 12 of those
envelopes to identify the subjects to be given the inereased dosage.
15. Sobriety Checkpoint One of the authors observed a sobriety checkpoint at which ev-
ery Sth driver was stopped and interviewed.
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