CHDA EXAM QUESTIONS WITH
CORRECT ANSWERS
Alpha |level |- |CORRECT |ANSWER✔✔-The |level |of |Type |I |error |that |is |deemed |acceptable |based
|on |context |in |statistical |hypothesis |testing. |See |Type |I |error.
Alternative |hypothesis |- |CORRECT |ANSWER✔✔-The |complement |of |the |null |hypothesis |that |is |
to |be |tested |using |the |appropriate |statistical |test. |This |hypothesis |typically |requires |some |
action |to |be |taken.
Ambulatory |payment |classification |(APC) |- |CORRECT |ANSWER✔✔-The |payment |unit |used |in |
the |hospital |outpatient |prospective |payment |system |(OPPS). |The |classification |is |a |resource-
based |reimbursement |system.
Analysis |- |CORRECT |ANSWER✔✔-Reviewing |and |summarizing |data |for |use |in |decision |making.
Analysis |of |variance |- |CORRECT |ANSWER✔✔-The |statistical |tool |used |to |compare |more |than |
two |population |means. |The |null |hypothesis |tests |that |all |of |the |population |means |are |equal.
Auditing |- |CORRECT |ANSWER✔✔-"The |performance |of |internal |and |external |reviews |(audits) |
to |identify |variations |from |established |baselines |(for |example, |review |of |outpatient |coding |as |
compared |with |CMS |outpatient |coding |guidelines)."
Balanced |design |- |CORRECT |ANSWER✔✔-An |experimental |design |where |the |number |of |
subjects |in |each |sample |are |the |same |for |all |populations |sampled. |The |term |is |relevant |when |
performing |an |analysis |of |variance |or |a |two |sample |t-test.
Bell |curve |- |CORRECT |ANSWER✔✔-The |shape |of |the |normal |distribution. |The |bell |pealcs |at |
the |average |and |slopes |down |on |both |sides |symmetrically.
,Binomial |variable |- |CORRECT |ANSWER✔✔-"A |variable |that |talces |only |two |values |(such |as |yes |
or |no; |alive |or |dead). |The |probability |of |a |yes |or |no |is |constant |across |all |of |the |subjects, |and |
the |outcome |of |each |subject |is |independent |of |the |others."
Case |Mix |Index |(CMI) |- |CORRECT |ANSWER✔✔-"The |average |relative |weight |of |all |cases |
treated |at |a |given |facility |or |by |a |given |physician, |which |reflects |the |resource |intensity |or |
clinical |severity |of |a |specific |group |in |relation |to |the |other |groups |in |the |classification |system; |
calculated |by |dividing |the |sum |of |the |weights |of |diagnosis-related |groups |for |patients |
discharged |during |a |given |period |by |the |total |number |of |patients |discharged."
Centers |for |Medicare |and |Medicaid |Services |(CMS) |- |CORRECT |ANSWER✔✔-"The |division |of |
the |Department |of |Health |and |Human |Services |that |is |responsible |for |developing |healthcare |
policy |in |the |United |States, |for |administering |the |Medicare |program |and |the |federal |portion |of
|the |Medicaid |program, |and |maintaining |the |procedure |portion |of |the |International |
Classification |of |Diseases, |ninth |revision, |Clinical |Modification |(ICD-9-CM) |and |International |
Classification |of |Diseases, |tenth |revision, |Procedure |Coding |System |(ICD-10-PCS); |called |the |
Health |Care |Financing |Administration |(HCFA) |prior |to |2001."
Chi |squared |test |- |CORRECT |ANSWER✔✔-A |statistical |test |that |is |used |to |test |for |relationships |
between |categorical |variables. |The |null |hypothesis |for |this |test |is |that |there |is |no |association |
between |the |two |variables. |Represented |by |the |symbol |X2 |(where |X |is |the |Greek |letter |chi.)
Cluster |random |sampling |- |CORRECT |ANSWER✔✔-"The |population |is |divided |into |groups |
before |the |sample |is |selected. |The |groups |or |clusters |must |be |mutually |exclusive |and |
exhaustive. |(That |is, |every |unit |in |the |population |is |assigned |to |one |and |only |one |cluster.) |
Clusters |are |then |randomly |selected |to |make |up |the |sample. |Cluster |sampling |may |be |
performed |as |single-stage |or |two-stage."
Cluster |Sampling |- |CORRECT |ANSWER✔✔-Sampling |where |population |is |divided |into |groups |
(or |clusters); |groups |are |then |randomly |selected |to |form |sample
, CMS-1500 |- |CORRECT |ANSWER✔✔-"1. |The |universal |insurance |claim |form |developed |and |
approved |by |the |American |Medical |Association |(AMA) |and |the |Centers |for |Medicare |and |
Medicaid |Services |(CMS) |that |physicians |use |to |bill |Medicare, |Medicaid, |and |private |insurers |
for |professional |services |provided |2. |A |Medicare |claim |form |used |to |bill |third-party |payers |for |
provider |services, |for |example, |physician |office |visits."
Coefficient |of |determination |- |CORRECT |ANSWER✔✔-"A |statistic |that |measures |the |amount |of
|variance |in |a |dependent |variable |explained |by |one |or |more |independent |variables. |If |there |is |
one |independent |variable, |then |this |value |is |the |Pearson |Correlation |Coefficient |squared."
Confidence |interval |- |CORRECT |ANSWER✔✔-An |interval |that |is |centered |at |the |sample |
estimate |of |a |population |value |that |may |be |calculated |so |that |it |has |a |preset |probability |of |
containing |the |population |value.
Confidence |level |- |CORRECT |ANSWER✔✔-The |probability |that |a |confidence |interval |includes |
the |true |value |of |a |population |statistic.
Contingency |tables |- |CORRECT |ANSWER✔✔-A |useful |method |for |displaying |the |relationship |
between |two |categorical |variables. |Each |category |is |displayed |as |rows |or |columns. |The |cells |in |
the |table |represent |the |count |of |subjects |with |each |category |attribute.
Convenience |sampling |- |CORRECT |ANSWER✔✔-A |sampling |technique |where |the |selection |of |
units |from |the |population |is |based |on |easy |availability |and/or |accessibility.
Correlation |- |CORRECT |ANSWER✔✔-A |statistic |that |is |used |to |describe |the |association |or |
relationship |between |two |continuous |variables.
Critical |value |- |CORRECT |ANSWER✔✔-The |value |that |a |test |statistic |must |be |larger |than |to |
conclude |statistical |significance. |The |value |is |based |on |the |alpha |level |of |the |test |and |the |
distribution |of |the |test |statistic |if |the |null |hypothesis |is |true.
CORRECT ANSWERS
Alpha |level |- |CORRECT |ANSWER✔✔-The |level |of |Type |I |error |that |is |deemed |acceptable |based
|on |context |in |statistical |hypothesis |testing. |See |Type |I |error.
Alternative |hypothesis |- |CORRECT |ANSWER✔✔-The |complement |of |the |null |hypothesis |that |is |
to |be |tested |using |the |appropriate |statistical |test. |This |hypothesis |typically |requires |some |
action |to |be |taken.
Ambulatory |payment |classification |(APC) |- |CORRECT |ANSWER✔✔-The |payment |unit |used |in |
the |hospital |outpatient |prospective |payment |system |(OPPS). |The |classification |is |a |resource-
based |reimbursement |system.
Analysis |- |CORRECT |ANSWER✔✔-Reviewing |and |summarizing |data |for |use |in |decision |making.
Analysis |of |variance |- |CORRECT |ANSWER✔✔-The |statistical |tool |used |to |compare |more |than |
two |population |means. |The |null |hypothesis |tests |that |all |of |the |population |means |are |equal.
Auditing |- |CORRECT |ANSWER✔✔-"The |performance |of |internal |and |external |reviews |(audits) |
to |identify |variations |from |established |baselines |(for |example, |review |of |outpatient |coding |as |
compared |with |CMS |outpatient |coding |guidelines)."
Balanced |design |- |CORRECT |ANSWER✔✔-An |experimental |design |where |the |number |of |
subjects |in |each |sample |are |the |same |for |all |populations |sampled. |The |term |is |relevant |when |
performing |an |analysis |of |variance |or |a |two |sample |t-test.
Bell |curve |- |CORRECT |ANSWER✔✔-The |shape |of |the |normal |distribution. |The |bell |pealcs |at |
the |average |and |slopes |down |on |both |sides |symmetrically.
,Binomial |variable |- |CORRECT |ANSWER✔✔-"A |variable |that |talces |only |two |values |(such |as |yes |
or |no; |alive |or |dead). |The |probability |of |a |yes |or |no |is |constant |across |all |of |the |subjects, |and |
the |outcome |of |each |subject |is |independent |of |the |others."
Case |Mix |Index |(CMI) |- |CORRECT |ANSWER✔✔-"The |average |relative |weight |of |all |cases |
treated |at |a |given |facility |or |by |a |given |physician, |which |reflects |the |resource |intensity |or |
clinical |severity |of |a |specific |group |in |relation |to |the |other |groups |in |the |classification |system; |
calculated |by |dividing |the |sum |of |the |weights |of |diagnosis-related |groups |for |patients |
discharged |during |a |given |period |by |the |total |number |of |patients |discharged."
Centers |for |Medicare |and |Medicaid |Services |(CMS) |- |CORRECT |ANSWER✔✔-"The |division |of |
the |Department |of |Health |and |Human |Services |that |is |responsible |for |developing |healthcare |
policy |in |the |United |States, |for |administering |the |Medicare |program |and |the |federal |portion |of
|the |Medicaid |program, |and |maintaining |the |procedure |portion |of |the |International |
Classification |of |Diseases, |ninth |revision, |Clinical |Modification |(ICD-9-CM) |and |International |
Classification |of |Diseases, |tenth |revision, |Procedure |Coding |System |(ICD-10-PCS); |called |the |
Health |Care |Financing |Administration |(HCFA) |prior |to |2001."
Chi |squared |test |- |CORRECT |ANSWER✔✔-A |statistical |test |that |is |used |to |test |for |relationships |
between |categorical |variables. |The |null |hypothesis |for |this |test |is |that |there |is |no |association |
between |the |two |variables. |Represented |by |the |symbol |X2 |(where |X |is |the |Greek |letter |chi.)
Cluster |random |sampling |- |CORRECT |ANSWER✔✔-"The |population |is |divided |into |groups |
before |the |sample |is |selected. |The |groups |or |clusters |must |be |mutually |exclusive |and |
exhaustive. |(That |is, |every |unit |in |the |population |is |assigned |to |one |and |only |one |cluster.) |
Clusters |are |then |randomly |selected |to |make |up |the |sample. |Cluster |sampling |may |be |
performed |as |single-stage |or |two-stage."
Cluster |Sampling |- |CORRECT |ANSWER✔✔-Sampling |where |population |is |divided |into |groups |
(or |clusters); |groups |are |then |randomly |selected |to |form |sample
, CMS-1500 |- |CORRECT |ANSWER✔✔-"1. |The |universal |insurance |claim |form |developed |and |
approved |by |the |American |Medical |Association |(AMA) |and |the |Centers |for |Medicare |and |
Medicaid |Services |(CMS) |that |physicians |use |to |bill |Medicare, |Medicaid, |and |private |insurers |
for |professional |services |provided |2. |A |Medicare |claim |form |used |to |bill |third-party |payers |for |
provider |services, |for |example, |physician |office |visits."
Coefficient |of |determination |- |CORRECT |ANSWER✔✔-"A |statistic |that |measures |the |amount |of
|variance |in |a |dependent |variable |explained |by |one |or |more |independent |variables. |If |there |is |
one |independent |variable, |then |this |value |is |the |Pearson |Correlation |Coefficient |squared."
Confidence |interval |- |CORRECT |ANSWER✔✔-An |interval |that |is |centered |at |the |sample |
estimate |of |a |population |value |that |may |be |calculated |so |that |it |has |a |preset |probability |of |
containing |the |population |value.
Confidence |level |- |CORRECT |ANSWER✔✔-The |probability |that |a |confidence |interval |includes |
the |true |value |of |a |population |statistic.
Contingency |tables |- |CORRECT |ANSWER✔✔-A |useful |method |for |displaying |the |relationship |
between |two |categorical |variables. |Each |category |is |displayed |as |rows |or |columns. |The |cells |in |
the |table |represent |the |count |of |subjects |with |each |category |attribute.
Convenience |sampling |- |CORRECT |ANSWER✔✔-A |sampling |technique |where |the |selection |of |
units |from |the |population |is |based |on |easy |availability |and/or |accessibility.
Correlation |- |CORRECT |ANSWER✔✔-A |statistic |that |is |used |to |describe |the |association |or |
relationship |between |two |continuous |variables.
Critical |value |- |CORRECT |ANSWER✔✔-The |value |that |a |test |statistic |must |be |larger |than |to |
conclude |statistical |significance. |The |value |is |based |on |the |alpha |level |of |the |test |and |the |
distribution |of |the |test |statistic |if |the |null |hypothesis |is |true.
