chapter 1 Flashcards
filed of probability and statistics related to sciences
Biostatistics
field of study of data collection, data organization, analysis, and reporting conclusions
Statistics
surveys (including observational studies) experiments (actively trying to change something) previously recorded data
sources of data
variable whos outcome is determined by chance
Random Variable
meaningful numeric data
Quantitative
Name, label, group, or category
Qualitative
“countable” numeric data gas in data on number line
discrete
entire spectrum on a number lines
continuous
entire group to be studied
population
measurement scale/measurement level
when collecting data the goal is to obtain higher levels of measurement
classification grouping or category
nominal
what are the four ways to measure
-nominal
-ordinal
-interval
-ration
data can be ordered but the differences are unknown/unclear
ordinal
data can be ordered differences are known but no natural 0 exists
interval
data can be ordered differences is natural 0
ration
easiest way to collect data for researcher
Convenience
users can choose to respond or not
voluntary response
everyone has an equal chance at being picked
random
each pull or selection is also random
simple random
break into groups and randomly sample within the groups
Stratified
break into groups sample everyone from the group
cluster
first subject selected random than a pattern/procedure follows
systematic
