a.avg. walk speed +10% over last 10 years (I)
b.reg. exercise increase libido of men (I)
c.avg. global temp increase by 2100 (I)
d.avg. people live 5% longer in Japan (D)
e.poll shows 74% college students favor cp (I)
f. pop. World now exceeds 6 billion (I)
g.4 years most frequent term in office (D)
h.men tend date more than women before settle(I)
i.74% Americans overweight/obese (I)
a.college gpa/income (O)
b.prescribed hours of sleep/learning rate (E)
c.self esteem/voluntary tv hours (O)
d.muscle mass before after puberty (O)
e.effect of prayer on random selected patients (E)
f.caffein and tailgating on highway (E)
g.relapse addicts randomly assigned different
rehabs (E)
h.ability to play instrument and GRE (O)
a.ehtnic group (qualitative, nominal)
b.age(quantitative, interval, continuous)
c.family size (quantitative, interval, discrete)
d.major (qualitative, nominal)
e.political affiliation (quantitative, nominal)
f.cook time (quantitative, interval, continuous)
g.parole violations (quantitative, interval, discrete)
h.frosh,soph,jun,sen (qualitative, ordinal)
i.SAT score (quantitative, interval, discrete)
j. Net worth (quantitative, interval ratio,
continuous)
k.Fav. sports (qualitative, nominal)
l.gender (qualitative, nominal)
m.position in line (ranked, ordinal)
n.population (qualitative, interval, discrete)
o.car speed (quantitative, interval, continuous)
p.like, neutral, dislike (qualitative, interval,
discrete)
Asks all his friends to participate. Ranks odor 110.
Sent on a blind date asked to report back whether
a second date obtained
a.is this true experiment
no, no random selection, no random assignment
and odor not controlled
IVNONE
DVBODY ODOR (quantitative, interval, discrete)
Second Date (Y/N, qualitative, nominal)
Establish cause and effect? No not a true
experiment
How Improve?
Randomly select people from population of
interest
Randomly assign people to good or bad smelling
groups
Sample 100 people randomly selected each given
3 meals/day but half also get chocolate bars. After
2 months people rate their mood 1 to 10
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 Spring '08
 Ard
 Standard Deviation, random assignment, first calculate mean, c.self esteem/voluntary tv, random selected patients

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