UNIT 1 C797 Data Science & Analytics Exam
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+
Descriptive statistics - ✔✔ANSWER✔✔->>>>>>>>numerical or
graphical summaries of data, and may include charts, graphs,
and simple summary statistics such as means and standard
deviations to describe characteristics of a population sample
Inferential statistics - ✔✔ANSWER✔✔->>>>>>>>statistical
techniques (e.g., chi-square test, the t test, the one-way
ANOVA) that allow conclusions to be drawn about the
,relationships found among different variables in a population
sample; how one variable is related to other variables
explanatory studies - ✔✔ANSWER✔✔->>>>>>>>Studies that
have the primary purpose of elucidating the relationships
among variables; often collected through observational studies
chi-square test - ✔✔ANSWER✔✔->>>>>>>>statistical test of
probability
Randomized control trials - ✔✔ANSWER✔✔-
>>>>>>>>experimental designs in which study participants are
randomly assigned to an intervention group
experimental studies are considered - ✔✔ANSWER✔✔-
>>>>>>>>the gold standard for causal inference
A study plan - ✔✔ANSWER✔✔->>>>>>>>a written presentation
of how the researcher is going to obtain and analyze the
numerical data needed to answer the research questions.
, Independent variables - ✔✔ANSWER✔✔->>>>>>>>those that
are manipulated or that may affect the outcome
Dependent variables - ✔✔ANSWER✔✔->>>>>>>>variables that
are expected to change in response to the characteristics,
exposures or interventions being studied
Research Designs most seen in Healthcare research -
✔✔ANSWER✔✔->>>>>>>>observational studies, quasi-
experimental studies, and experimental studies
Observational studies - ✔✔ANSWER✔✔->>>>>>>>a
phenomenon is simply observed and no intervention is
instituted; appropriate when the purpose of the study is
descriptive, when the hypotheses are exploratory, or when it is
not possible to manipulate the exposure being studied
three main types of observational studies - ✔✔ANSWER✔✔-
>>>>>>>>cross-sectional studies, case-control studies, and
longitudinal studies (also referred to as "cohort studies"
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