PUB561 MOD1 PT1 QUESTIONS WITH COMPLETE SOLUTIONS

PUB561 MOD1 PT1 QUESTIONS WITH COMPLETE
SOLUTIONS

•Relationship: Correct Answer association between 2 or more
variables

3 Sources of variation in samples Correct Answer random
error
systematic error or bias
confounding

4 phases of data collection Correct Answer CPCR
Concept phase
Planning phase
Conducting phase
Research application

Applied statistics Correct Answer focus on
developing/adapting methods to deal with difficult problems
thrown up by the sciences

Biostatistics Correct Answer focus on using statistics to
answer problems in biology, (bio)medical and health sciences

bivariate data Correct Answer Data with two variables
• Differences between groups
• Relationships between variables
• Changes within a group over time

• You can describe these using numerical or graphical
summaries

, box and whisker plot is a graphic way to display the... Correct
Answer median,
quartiles, Q1, Q3 and IQR
Min
Max

Branches of statistics Correct Answer Theoretical statistics
Applied statistics

case controlled study Correct Answer a retrospective
observational study that compares exposure in two groups of
subjects. Subjects in one group have the disease (cases), whereas
those in the other group are free of the disease (controls)

catagorical variable Correct Answer Also called qualitative or
nominal variable. Basically groups of things includes:
-Dichotomous/binary
-Nominal
-Ordinal
-interval

Categorical data can be graphically presented in... Correct
Answer frequencies ad proportions
Pie charts
Bar graphs

cohort study Correct Answer study that measures variables of
a group of people over time
RETRO AND PROSPECTIVE
-observational study