15) The study you are reading reports a significant correlation coefficient of -0.5 between home size and hours spent at work. You know this means:

as home size gets larger, hours spent at work get smaller

there is no relationship between home size and hours spent at

work

there is a weak relationship between home size and hours spent

at work

as home size gets smaller, hours spent at work gets smalls

16) You are studying the relationship between exercise and BMI

and find a significant correlation of -0.7. Based on this study, if a person

increases her exercise two hours a week you would expect his/her BMI to:

decrease

decrease by 0.7 pounds

increase by 0.7 pounds

stabilize

17) You are interested determining the difference in the

exercise patterns of college students on athletic teams.You randomly

sample ten soccer players and ten hockey players who are in their freshman year

of college.If you want to use the t-test you know you must measure exercise

patterns at what level?

interval or ratio

ordinal

nominal

All of the above

18) Your study examines knowledge gained from your intervention

using an exam score.Your participants complete a pre and post test exam

which is graded on a scale of 0-100%.Which type of analysis would be

appropriate?

chi square

t-test for dependent groups

multicollinearity

t-test for independent groups

19) You are conducting a study with twenty-five randomly

selected participants in a methadone rehabilitation program. You measure the

withdrawal index for all the participants at the beginning of the study, after

one week of daily guided meditation practice, and then after one week on a new

herbal supplement. This study design may be problematic because of:

lack of independence

recall bias

carry-over effects

degree's of freedom

20) Which statistic is most appropriate for measuring the

strength of the association between an exposure and disease outcome in a

case-control study?

odds ratio

relative risk

attributable risk in the population

student t-test

21) Your study takes a group of adults with lupus and asks them

about their previous exposure to Epstein barr, pesticides, and sexually

transmitted diseases. This is an example of what type of study?

cohort

chi-square analysis

case-control

randomized clinical trial

22) You read a small study which uses an independent t-test to

examine the difference between the average birth weight of infants with

mothers who smoke vs. those with mothers who do not smoke.The study has

an alpha of 0.05 and a p value of 0.07.However, a larger study completes

the same analysis and has reported a t-test with a p value of 0.02.You

realize the smaller study probably made:

an overpowered error

a type I error

a type II error

a type III error

23) You conduct a study to determine if there is a difference in

average number of hours slept each week between husbands and wives.What

would be an appropriate test?

repeat measures ANOVA

t-test for dependent groups

repeat measures t-test

t-test for independent groups

24) In January of 2007, a clinic with 300 previously identified

HIV+ patients performs a routine screening and discovers ten additional

patients who are HIV+. The incidence of HIV+ patients in this clinic between

January and February 2007 is:

310

300

10

unable to determine

25) You are reading a study which reports a significant

correlation (r) between smoking and coffee drinking of 0.8. You know this

means:

when participants smoke more they drink less coffee

when participants smoke more they drink more coffee

when participants smoke more their coffee drinking is decreased

by 75%

when participants smoke more they only drink 75% of the coffee

they were drinking