# Biostatistics

Home > Preview

The flashcards below were created by user arsantos5 on FreezingBlue Flashcards.

1. Statistics
is the science of collecting, processing, analyzing and interpreting data in such a way that conclusions can be drawn in an objective manner.
2. Biostatistics
pertains to statistics as applied to the biological and health sciences
3. Descriptive statistics
number of students receiveing an A

State & Federal statistics (pregnancy rate among women under the age of 16, number of cases of AIDS reported yearly, unemployment rate)

Proportion of study subjects receiving a new experimental drug who are cured of their disease
4. Inferential Statistics
Determining the factors that increase the risk of an individual developing coronary heart disease

Establishing whether a laparoscopic surgical procedure results in a shorter recovery period than a more invasive, traditional alternative

compare the effectiveness of two drugs that are often prescribed to patients who suffer from arthritis

asessing the reduction of child mortality in MVA resulting from the use of seat belts.
5. Probability
the science of characterizing the behavior of random phenomena
6. population
Parameter

the complete set of objects of interest
7. Sample
subset of a population
8. Categorical
Nominal or ordinal
9. Numerical
Discrete or continuous
10. Nominal
values are unordered categories or classes for which there is not a natural ordering

ex: political affiliation, gender, marital status
11. Ordinal
There is a natural ordering among the category values

ex: injury severity scale, activity level, severity of disease
12. Discrete
data values are counts. Both order and magnitude are important. They tell how many were observed

ex: # of live births, # of deaths attributed to a given cause, # of relapses of a disease observed in a given time frame

whole #
13. Continuous
Data that can take on any decimal value within a given range

ex: height or weight, distance, time, temperature
14. Tables
are a common method of displaying data, especially for categorical or discrete data
15. absolute frequency
number of units in a given category
16. Relative Frequency
proportion of the total count
17. Cumulative Relative Frequency
percentage of the total count (total number of observations) that have a value less than or equal to the upper limit of the interval
18. Two ways to summarize a distribution
• Graphical
• Arithmetic
19. Bar Charts
very common and are used to show the frequency/relative frequency observed in differnet (nominal or ordinal) categories
20. Histogram
is a graphical representation of a frequency or relative frequency distribution
21. Box Plots
a graphical representation of the quartiles of a data set. They also indicate unusual data values. Atypical values in a data set are outliers.
22. Symmetric
the left side is a mirror image of the right side
23. Skewed Left
if the majority of the area of the box plot is on the right, and the area gradually trails off on the left.
24. Skewed Right
If the majority of the area of the box is on the left and the area gradually trails off to the right.

## Card Set Information

 Author: arsantos5 ID: 282109 Filename: Biostatistics Updated: 2014-09-04 22:41:48 Tags: biostatistics Folders: Description: Lecture 1, 1a Show Answers:

Home > Flashcards > Print Preview