D514 Exam Questions With Correct Answers
// // // // //
ANOVA //- /
/CORRECT /
/ANSWERS(S)✔✔Analysis /
/of /
/variance /
/(ANOVA) /
/may //be //used //in //research //studies //where //there //are //three //or //more //groups //to //compare. //
Stands //for //analysis //of //variance. //The //ANOVA //test //is //similar //to //the //independent-samples //t-
test. /
/It /
/is /
/used /
/as //
a/
/test /
/to /
/compare /
/means /
/between /
/independent //variables //with //similar //variance //and //normality //of //distribution. //Whereas //the //t-
test //compares //just //two //means, //an //ANOVA //test //can //be //used //to //compare //multiple //groups.
Example: /
/Researchers /
/are /
/performing //
a/
/randomized /
/clinical /
/trial //evaluating //the //effectiveness //of //three //distinct //treatments //for //painful //TMJ //clicking.
60 /
/patients /
/were /
,/randomly /
/assigned /
/to //
3/
/treatment //options: //(A) //anterior //positioning //splint //therapy; //(B) //physical //therapy; //(C) //physical
//therapy //and //splinting.
Similar //to //the //t-
test /
/in /
/that /
/patients /
/are /
/all /
/from /
/same /
/type /
/of /
/distribution /
/(they /
/have /
/the /
/same //medical //diagnosis) //but //there //are //more //than //2 //treatments //in //the //experimental //study.
Chi-
Square /
/Test //- /
/CORRECT /
/ANSWERS(S)✔✔Determines /
/if //an //association //exists //between //two //categorical //variables. //Qualitative //in //nature. //
Tests /
/for /
/relationships /
/between //categorical //variables. //Chi //Square //is //used //when //you //are //comparing //values //you //can
//observe //with //those //you //expect.
• //Chi //square //is //a //group //of //tests //generally //used //with //qualitative //or //non-
normal //data. //There //are //chi-
,square /
/tests /
/that /
/can /
/be /
/used /
/to /
/compare /
/independent //measures //as //well //as //tests //to //look //for //differences //or //for //relationships
Example: /
/The /
/owner /
/of //
a/
/laboratory /
/wants /
/to /
/keep /
/sick /
/leave /
/as /
/low /
/as /
/possible /
/by /
/keeping /
/employees /
/healthy /
/through /
/disease /
/prevention /
/programs. //Many //employees //get //flu //in //the //winter //months, //leading //to //productivity //problems
//due /
/to /
/sick /
/leave /
/from /
/the /
, /disease. /
/There /
/are /
/many /
/sources /
/for /
/flu /
/vaccine /
/today, /
/and /
/the /
/owner //believes //that //it //is //important //to //get //as //many //employees //vaccinated //as //possible. //Due
//to //
a/
/regional /
/shortage, //there //was //only //enough //vaccine //for //half //the //employees, //last //flu //season. //In //effect,
//there /
/are /
/two /
/groups; /
/employees //who //received //the //vaccine //and //employees //who //did //not //receive //the //vaccine. //The
//company /
/sent //
a/
/nurse /
/to /
/every /
/employee /
/who /
/calls /
/in /
/sick /
/with /
/flu, /
/to /
/provide /
/care /
/if /
// // // // //
ANOVA //- /
/CORRECT /
/ANSWERS(S)✔✔Analysis /
/of /
/variance /
/(ANOVA) /
/may //be //used //in //research //studies //where //there //are //three //or //more //groups //to //compare. //
Stands //for //analysis //of //variance. //The //ANOVA //test //is //similar //to //the //independent-samples //t-
test. /
/It /
/is /
/used /
/as //
a/
/test /
/to /
/compare /
/means /
/between /
/independent //variables //with //similar //variance //and //normality //of //distribution. //Whereas //the //t-
test //compares //just //two //means, //an //ANOVA //test //can //be //used //to //compare //multiple //groups.
Example: /
/Researchers /
/are /
/performing //
a/
/randomized /
/clinical /
/trial //evaluating //the //effectiveness //of //three //distinct //treatments //for //painful //TMJ //clicking.
60 /
/patients /
/were /
,/randomly /
/assigned /
/to //
3/
/treatment //options: //(A) //anterior //positioning //splint //therapy; //(B) //physical //therapy; //(C) //physical
//therapy //and //splinting.
Similar //to //the //t-
test /
/in /
/that /
/patients /
/are /
/all /
/from /
/same /
/type /
/of /
/distribution /
/(they /
/have /
/the /
/same //medical //diagnosis) //but //there //are //more //than //2 //treatments //in //the //experimental //study.
Chi-
Square /
/Test //- /
/CORRECT /
/ANSWERS(S)✔✔Determines /
/if //an //association //exists //between //two //categorical //variables. //Qualitative //in //nature. //
Tests /
/for /
/relationships /
/between //categorical //variables. //Chi //Square //is //used //when //you //are //comparing //values //you //can
//observe //with //those //you //expect.
• //Chi //square //is //a //group //of //tests //generally //used //with //qualitative //or //non-
normal //data. //There //are //chi-
,square /
/tests /
/that /
/can /
/be /
/used /
/to /
/compare /
/independent //measures //as //well //as //tests //to //look //for //differences //or //for //relationships
Example: /
/The /
/owner /
/of //
a/
/laboratory /
/wants /
/to /
/keep /
/sick /
/leave /
/as /
/low /
/as /
/possible /
/by /
/keeping /
/employees /
/healthy /
/through /
/disease /
/prevention /
/programs. //Many //employees //get //flu //in //the //winter //months, //leading //to //productivity //problems
//due /
/to /
/sick /
/leave /
/from /
/the /
, /disease. /
/There /
/are /
/many /
/sources /
/for /
/flu /
/vaccine /
/today, /
/and /
/the /
/owner //believes //that //it //is //important //to //get //as //many //employees //vaccinated //as //possible. //Due
//to //
a/
/regional /
/shortage, //there //was //only //enough //vaccine //for //half //the //employees, //last //flu //season. //In //effect,
//there /
/are /
/two /
/groups; /
/employees //who //received //the //vaccine //and //employees //who //did //not //receive //the //vaccine. //The
//company /
/sent //
a/
/nurse /
/to /
/every /
/employee /
/who /
/calls /
/in /
/sick /
/with /
/flu, /
/to /
/provide /
/care /
/if /
