Introduction To Biostatisics

Question 1

Statistics

Answer 1

Methods/ tools used to collect , organize , summarize , summarize and preset data in health and disease from research studies

Question 2

Link between population and samples

Answer 2

We use study samples to make inferences about population that we are interested in

Question 3

Biostatistics

Answer 3

Applications of statistical methods to problems in the biological and related sciences ie medicine and public health

Question 4

Application of biostatistics

Answer 4

Epidemiology
Clinical studies
Health statistics
Lab studies
Human biology

Question 5

Parameter vs statistic

Answer 5

Parameter - population characteristic
Statistic - used to describe sample

Question 6

Variable

Answer 6

Quantity or measure that differs from person to person ie height, weight

Question 7

Classification of variables

Answer 7

Categorical- nominal , ordinal
Numerical - discrete , continuous

Question 8

Categorical nominal

Answer 8

No natural order of levels
Ex: gender , race , species , marital status

Question 9

Categorical ordinal

Answer 9

Natural ordering of the levels
Ex: good/ better/best
Tumor benign / malignant

Question 10

Quantitative variables

Answer 10

Numerical variables, takes arithmetic operations
Ex : discrete or continuous level

Question 11

Examples of discrete and continuous

Answer 11

Discrete: takes on integer values ex : number of children
Continuous : takes on many values , may be decimal
Ex : blood pressure, temperature

Question 12

Roles of variables

Answer 12

Predictor - used to predict value of another variable
Outcomes - variable that is predicted or explained by 1/more predictor variables

Question 13

What is data

Answer 13

Measurement collected on a variable as a result of taking observation can be quantitative or categorical