CHDA Domain 3 (Data Analysis) Exam
Questions With Correct Answers
Among |the |software |programs |listed |below, |the |one |best |suited |to |detailed |statistical |analysis |
of |data |is |which |of |the |following? |- |CORRECT |ANSWER✔✔-SPSS
Non-parametric |tests |such |as |a |Kruskal-Wallis |are |advantageous |compared |to |their |parametric |
counterparts |for |which |of |the |following |reasons? |- |CORRECT |ANSWER✔✔-They |require |few |
assumptions
Which |of |the |following |is |an |expression |of |the |extent |of |a |linear |relationship |between |two |
variables? |- |CORRECT |ANSWER✔✔-Correlation
Your |CMO |has |requested |that |you |track |patient |satisfaction |over |time |and |in |a |way |that |
attempts |to |separate |routine |variation |from |true |underlying |changes |over |time. |The |est |tool |to
|select |from |the |options |below |is |a |____. |- |CORRECT |ANSWER✔✔-Statistical |process |control |
chart
When |a |data |analyst |develops |a |sample |selection |involving |the |choice |of |every |fourth |patient |
from |each |clinic |schedule |for |each |physician |during |the |course |of |a |three |month |period, |this |
sampling |technique |being |used |by |the |analyst |is |called |which |of |the |following? |- |CORRECT |
ANSWER✔✔-Systematic |random |sampling
How |do |you |calculate |range? |- |CORRECT |ANSWER✔✔-Max |- |Min
The |type |of |statistical |techniques |used |to |make |conclusions |based |on |a |sample |are |____. |- |
CORRECT |ANSWER✔✔-Inferential
, The |mean |is |an |appropriate |statistic |to |use |to |measure |which |type |of |data? |- |CORRECT |
ANSWER✔✔-Ratio |(quantitative |data |where |there |is |an |absolute |0, |there |can |be |no |negative |
numerical |value |in |ratio |data |(example |is |weight))
In |a |chi-squared |test |of |independence, |the |test |statistic |is |7.23 |and |the |alpha |is |.01 |(critical |
value |6.635). |What |is |the |conclusion? |- |CORRECT |ANSWER✔✔-Reject |the |null |hypothesis |
(when |the |test |statistic |is |greater |than |your |critical |value)
If |a |health |plan |analyst |wanted |to |determine |if |the |readmissions |rates |for |two |hospitals |were |
statistically |different, |what |hypothesis |test |should |be |used? |- |CORRECT |ANSWER✔✔-Two-
sample |z-test |for |proportions
A |researcher |would |like |to |test |the |null |hypothesis |that |the |LOS |at |two |hospitals |are |equal. |
What |statistical |test |should |the |researcher |use |in |this |situation? |- |CORRECT |ANSWER✔✔-t-test
|for |means
We |want |to |compare |the |average |weight |of |patients |before |and |after |a |specialty |diet |is |
administered. |We |expect |the |weight |to |decrease |after |administration |of |the |diet. |Which |of |the
|following |tests |should |be |conducted |to |determine |if |the |average |weight |for |each |patient |is |
less |at |the |conclusion |of |the |diet? |- |CORRECT |ANSWER✔✔-Paired |t-test
The |variable |that |may |cause |the |change |in |a |second |variable |is |called |the |____. |- |CORRECT |
ANSWER✔✔-Independent |variable |(the |variable |that |is |used |to |predict |is |called |the |
independent, |the |outcome |variable |is |the |dependent)
If |the |correlation |between |years |of |experience |and |salary |is |positive, |what |can |you |conclude |
about |the |slope |of |a |regression |line |that |might |be |fit |to |describe |the |relationship? |- |CORRECT |
ANSWER✔✔-The |slope |will |be |positive
What |are |the |assumptions |made |regarding |the |residuals |in |least |squares |regression? |- |
CORRECT |ANSWER✔✔-The |mean |is |zero, |they |are |all |independent, |they |are |approximately |
normally |distributed
Questions With Correct Answers
Among |the |software |programs |listed |below, |the |one |best |suited |to |detailed |statistical |analysis |
of |data |is |which |of |the |following? |- |CORRECT |ANSWER✔✔-SPSS
Non-parametric |tests |such |as |a |Kruskal-Wallis |are |advantageous |compared |to |their |parametric |
counterparts |for |which |of |the |following |reasons? |- |CORRECT |ANSWER✔✔-They |require |few |
assumptions
Which |of |the |following |is |an |expression |of |the |extent |of |a |linear |relationship |between |two |
variables? |- |CORRECT |ANSWER✔✔-Correlation
Your |CMO |has |requested |that |you |track |patient |satisfaction |over |time |and |in |a |way |that |
attempts |to |separate |routine |variation |from |true |underlying |changes |over |time. |The |est |tool |to
|select |from |the |options |below |is |a |____. |- |CORRECT |ANSWER✔✔-Statistical |process |control |
chart
When |a |data |analyst |develops |a |sample |selection |involving |the |choice |of |every |fourth |patient |
from |each |clinic |schedule |for |each |physician |during |the |course |of |a |three |month |period, |this |
sampling |technique |being |used |by |the |analyst |is |called |which |of |the |following? |- |CORRECT |
ANSWER✔✔-Systematic |random |sampling
How |do |you |calculate |range? |- |CORRECT |ANSWER✔✔-Max |- |Min
The |type |of |statistical |techniques |used |to |make |conclusions |based |on |a |sample |are |____. |- |
CORRECT |ANSWER✔✔-Inferential
, The |mean |is |an |appropriate |statistic |to |use |to |measure |which |type |of |data? |- |CORRECT |
ANSWER✔✔-Ratio |(quantitative |data |where |there |is |an |absolute |0, |there |can |be |no |negative |
numerical |value |in |ratio |data |(example |is |weight))
In |a |chi-squared |test |of |independence, |the |test |statistic |is |7.23 |and |the |alpha |is |.01 |(critical |
value |6.635). |What |is |the |conclusion? |- |CORRECT |ANSWER✔✔-Reject |the |null |hypothesis |
(when |the |test |statistic |is |greater |than |your |critical |value)
If |a |health |plan |analyst |wanted |to |determine |if |the |readmissions |rates |for |two |hospitals |were |
statistically |different, |what |hypothesis |test |should |be |used? |- |CORRECT |ANSWER✔✔-Two-
sample |z-test |for |proportions
A |researcher |would |like |to |test |the |null |hypothesis |that |the |LOS |at |two |hospitals |are |equal. |
What |statistical |test |should |the |researcher |use |in |this |situation? |- |CORRECT |ANSWER✔✔-t-test
|for |means
We |want |to |compare |the |average |weight |of |patients |before |and |after |a |specialty |diet |is |
administered. |We |expect |the |weight |to |decrease |after |administration |of |the |diet. |Which |of |the
|following |tests |should |be |conducted |to |determine |if |the |average |weight |for |each |patient |is |
less |at |the |conclusion |of |the |diet? |- |CORRECT |ANSWER✔✔-Paired |t-test
The |variable |that |may |cause |the |change |in |a |second |variable |is |called |the |____. |- |CORRECT |
ANSWER✔✔-Independent |variable |(the |variable |that |is |used |to |predict |is |called |the |
independent, |the |outcome |variable |is |the |dependent)
If |the |correlation |between |years |of |experience |and |salary |is |positive, |what |can |you |conclude |
about |the |slope |of |a |regression |line |that |might |be |fit |to |describe |the |relationship? |- |CORRECT |
ANSWER✔✔-The |slope |will |be |positive
What |are |the |assumptions |made |regarding |the |residuals |in |least |squares |regression? |- |
CORRECT |ANSWER✔✔-The |mean |is |zero, |they |are |all |independent, |they |are |approximately |
normally |distributed
