What is strictly classification such as red, blue, green
nominal
level of measurement which scores are ranks, such as 1st 2nd 3rd
ordinal
Level of measurement in which values have equal intervals, but no true zero point such as Time or Temperature on the Celsius scale
interval
The highest level of measurement in which there are equal intervals between score units and a true zero point such as
Height
Weight
ROM
ratio
A set of statistical procedures that are not based on assumptions about population parameters, used with nominal and ordinal data
non parametric
Statistical procedures for estimating population parameters and for testing hypothesis. Used with interval and ratio data
parametric
What are some examples of non parametric tests?
Chi- Square
Probability tests
Mann- Whitney
Wilcoxon Signed- Rank
Kruskal Wallis
What are some examples of parametric tests?
T- tests
ANOVA (analysis of variance)
Pearson Correlation Coefficient
A characteristic that can be manipulated or observed and that can take on different values, either quantitatively or qualitatively
variable
The variable that is presumed to cause, explain or influence a dependent variable
independent variable
A response variable that is assumed to depend on or be caused by another (independent) variable
dependent variable
What is MCID?
minimal clinically important difference
4 degrees of Data we collect
Nominal, ordinal, Interval, Ratio
2 major Types of Statistical Testing
Parametric, Non Parametric
Non-Parametric Data
Nominal and Ordinal
Parametric Data
Ratio, Interval
Null Hypothesis
States nothing is going do nothing...No effect Null hypo
2 types of error classification
Type 1 - False Positive type 2- False Negative
What is a p-value? What is it usually set to...
If it is unlikely enough that the difference in outcomes occurred by chance alone, the difference is pronounced "statistically significant." Mathematical probabilities like p-values range from 0 (no chance) to 1 (absolute certainty). So 0.5 means a 50 per