C955 Module 6 Guide Exam with
Questions and Verified Answers 2025
GRADED A+
A ,researcher ,conducts ,an ,observational ,study ,and ,finds ,a ,correlation ,between
,managers' ,income ,and ,the ,number ,of ,college ,credits ,earned. ,The ,correlation
,coefficient ,was ,r=.85 ,with ,a ,regression ,equation ,of ,y=515x+120000. ,What ,can
,you ,say ,about ,the ,relationship ,between ,these ,variables? ,- ,CORRECT ,ANSWER-
There ,is ,an ,association ,between ,these ,variables.
A ,researcher ,wants ,to ,know ,if ,there ,was ,a ,relationship ,between ,student ,age
,and ,desire ,to ,complete ,a ,college ,degree. ,To ,answer ,this ,question, ,the
,researcher ,used ,a ,local ,community ,college ,as ,the ,sampling ,frame ,and ,then
,used ,stratified ,sampling ,to ,get ,a ,sample ,of ,students ,from ,18 ,to ,80 ,years ,old.
,Based ,on ,the ,information ,given, ,is ,there ,any ,potential ,bias ,in ,this ,study? ,-
,CORRECT ,ANSWER-Yes, ,because ,the ,sampling ,frame ,does ,not ,match ,the
,intended ,population ,of ,the ,question.
She ,performs ,a ,linear ,regression ,and ,comes ,up ,with ,a ,least ,squares ,regression
,line ,of ,y+=-1.64x+176.6 ,with ,r=-0.89 ,where ,x ,is ,the ,temperature ,and ,y ,is ,the
,number ,of ,daily ,soup ,sales. ,How ,much ,soup ,should ,she ,expect ,to ,sell ,on ,a
,day ,that ,is ,50 ,degrees? ,- ,CORRECT ,ANSWER-95 ,orders ,of ,soup.
A ,relationship ,between ,two ,or ,more ,variables ,is ,known ,as ,a ,___. ,- ,CORRECT
,ANSWER-Association
An ,association ,is ,a ,pattern ,or ,relationship ,between ,two ,or ,more ,variables.
When ,linear ,regression ,is ,used ,to ,show ,there ,is ,a ,linear ,association ,between
,two ,variables, ,we ,know ,the ,relationship ,is: ,- ,CORRECT ,ANSWER-Correlation
What ,does ,it ,mean ,for ,a ,result ,or ,relationship ,to ,be ,statistically ,significant? ,-
,CORRECT ,ANSWER-The ,relationship ,is ,not ,caused ,by ,mere ,chance.
What ,is ,the ,most ,appropriate ,definition ,of ,a ,scatterplot? ,- ,CORRECT ,ANSWER-
a ,graph ,where ,the ,explanatory ,and ,response ,variables ,are ,plotted ,as ,ordered
,pairs.
What ,must ,be ,true ,about ,the ,dots ,on ,a ,scatterplot ,if ,there ,is ,no ,correlation? ,-
,CORRECT ,ANSWER-The ,dots ,form ,no ,recognizable ,linear ,pattern.
Questions and Verified Answers 2025
GRADED A+
A ,researcher ,conducts ,an ,observational ,study ,and ,finds ,a ,correlation ,between
,managers' ,income ,and ,the ,number ,of ,college ,credits ,earned. ,The ,correlation
,coefficient ,was ,r=.85 ,with ,a ,regression ,equation ,of ,y=515x+120000. ,What ,can
,you ,say ,about ,the ,relationship ,between ,these ,variables? ,- ,CORRECT ,ANSWER-
There ,is ,an ,association ,between ,these ,variables.
A ,researcher ,wants ,to ,know ,if ,there ,was ,a ,relationship ,between ,student ,age
,and ,desire ,to ,complete ,a ,college ,degree. ,To ,answer ,this ,question, ,the
,researcher ,used ,a ,local ,community ,college ,as ,the ,sampling ,frame ,and ,then
,used ,stratified ,sampling ,to ,get ,a ,sample ,of ,students ,from ,18 ,to ,80 ,years ,old.
,Based ,on ,the ,information ,given, ,is ,there ,any ,potential ,bias ,in ,this ,study? ,-
,CORRECT ,ANSWER-Yes, ,because ,the ,sampling ,frame ,does ,not ,match ,the
,intended ,population ,of ,the ,question.
She ,performs ,a ,linear ,regression ,and ,comes ,up ,with ,a ,least ,squares ,regression
,line ,of ,y+=-1.64x+176.6 ,with ,r=-0.89 ,where ,x ,is ,the ,temperature ,and ,y ,is ,the
,number ,of ,daily ,soup ,sales. ,How ,much ,soup ,should ,she ,expect ,to ,sell ,on ,a
,day ,that ,is ,50 ,degrees? ,- ,CORRECT ,ANSWER-95 ,orders ,of ,soup.
A ,relationship ,between ,two ,or ,more ,variables ,is ,known ,as ,a ,___. ,- ,CORRECT
,ANSWER-Association
An ,association ,is ,a ,pattern ,or ,relationship ,between ,two ,or ,more ,variables.
When ,linear ,regression ,is ,used ,to ,show ,there ,is ,a ,linear ,association ,between
,two ,variables, ,we ,know ,the ,relationship ,is: ,- ,CORRECT ,ANSWER-Correlation
What ,does ,it ,mean ,for ,a ,result ,or ,relationship ,to ,be ,statistically ,significant? ,-
,CORRECT ,ANSWER-The ,relationship ,is ,not ,caused ,by ,mere ,chance.
What ,is ,the ,most ,appropriate ,definition ,of ,a ,scatterplot? ,- ,CORRECT ,ANSWER-
a ,graph ,where ,the ,explanatory ,and ,response ,variables ,are ,plotted ,as ,ordered
,pairs.
What ,must ,be ,true ,about ,the ,dots ,on ,a ,scatterplot ,if ,there ,is ,no ,correlation? ,-
,CORRECT ,ANSWER-The ,dots ,form ,no ,recognizable ,linear ,pattern.
