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Biostatistics basics review
review of the absolute basics of statistics and analysis
27
Mathematics
Undergraduate 2
09/19/2008

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Cards

Term
Data
Definition
The raw material of statistics which is comprised of numbers
Term
Statistics
Definition

the field of study concerned with

1. the collection, organization, summarization and analysis of data

2. the drawing of inferences about a body of data when only part of the data is observed

Term
4 sources of data?
Definition

1. Routinely kept records

2. Surveys

3. Experiments

4. External sources

Term
Biostatistics
Definition
statistical analysis of data derived from the biological sciences and the field of medicine
Term
Variable
Definition
An observed characteristic that differs between individuals/circumstances
Term
Quantitative variable
Definition
a variable that can be measured in an amount
Term
qualitative variables
Definition
variables that can be expressed as an attribute and not a number
Term
random variable
Definition

when the value of a variable is determined by chance factors and cannot be predicted, this is known as a random variable

Term
Discrete variable characteristics
Definition

1. can be pigeon holed

2. Has no absolute 0

3. arithmetic cannot be done on it

4. For values A and B there is no C between them

Term
Continuous variable characteristics
Definition

1. Has an absolute 0

2. can have arithmetic operations done on it

3. for values A and B, there is a possible C between them

Term
Population
Definition

The largest collection of entitites for which we have an interest at a particular time

Term
Sample
Definition
a part of a population
Term
Measurement
Definition
the assignment of numbers to objects or events according to a set of rules
Term
Statistical inference
Definition
the procedure by which we reach a conclusion about a population on the basis of the information contained in a sample that has been drawn from that population
Term
Statistical reasoning...
Definition
(1) uses patterns in data and numbers to (2) answer difficult questions (3) asked by clients (end users/people with money)
Term
PIM
Definition
Plot-interpretation-model
Term
DV Plot
Definition

Bar chart or pie chart

Term
CV plot
Definition
Histogram and Stem and Leaf
Term

DV interpretation

Definition
Mode
Term
CV interpretation
Definition

For a symetric graph, use mean and variance

For asymetric graph, use 5 number summary

for both, mode is also an acceptable statistic

Term

The most important question in statistics...

Definition
WHO CARES?
Term
2 characteristics of Mediating/lurking variable
Definition

1. Variable

2. (a) it is a cause that gets inbetween the cause and effect, changing the result

(b) and we don't know it is there

Term
in terms of how many digits you use...
Definition
Keep all digits until presentation, then only keep 2 to the right of the decimal
Term
Variance=...
Definition

the sum from 1 to n of the square of the difference of the value and the mean, divided by the number of values minus 1

Term
What is the equation for the location of the median value?
Definition

N+1

2

Term

Q1=

Definition

(N+1)

4

Term
What is the name of the man who organized PIM for the field of statistics?
Definition
Tukey BellLubr
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