Chapter 1 intro to stats and levels of meas Flashcards
what is a population
• Population is an overall group or “reference population”
what is a statistic
• Statistic is an estimate generated from a sample
parameter
• Measured char of a pop is called a parameter eg meas of avg temp for a whole year
statistic is to ___ as parameter is to ___
• Statistic is to sample as aparameter is to pop
is independent or dependent variable controlled by the researcher
independent
outcome variable aka
dependent
if variables fall on a continuum of in between values like temp it is what kind of variable
continuous
discrete variable aka and defn
-gen Qal or Qnt in nature
• Categorical variables aka discrete variables have finite number of classification groups or categories and are gen Qal in nature
indicates a difference between 2 answers and one isn’t greater or less than the other eg M or F. The categories are exclusive and exhaustive
nominal data
this type of data must be exhaustive, exclusive AND rank ordered
-do you know the level of diff between categories
ordinal data
no
____ is is exhaustive exclusive and rank ordered with numerically equal interval
eg of this
interval data
temperature (equal distance between each degree)
what kind of data has a point at which the variable is absent what other char does it have
• Ratio data eg BP is exhaustive exclusive and rank ordered w equal intervals AND a point where the variable is abset. Its the highest level of measmt and gives most options for data analysis. Not all variables can be meas at this level
what is the highest level of meas and what gives you the greatest number of options for data analysis
ratio data
would wt be ctegorical or continuous variable
which is used more for Qal
wt is continuous
Qal is gen categorical
if researcher asks pts bt their comfort in new type of hospital gown what type of data is this ratio indep Qnt Ql
qual
