EBDM
Qualitative Research
thoughts, feelings, opinions NO STATS
Quantitative Research
discovery through measurement and common research in dentistry = Studies
descriptive statistics
% to describe a sample population
Inferential statistics
statistical tests to extrapolate results to representative population
NULL hypothesis
idea that there are no differences between treatment groups. This is used since it’s easier to disprove than prove a hypothesis
P - values
determines if results are significant. (low P value = more doubt to NULL hypothesis. P values <.05 are significant and null hypothesis is accepted)
P - Probability
- measured between 1 - 0.
0 = certain not occur
1 = certain to occur
-used to determine the chance
Type 1 Error
False positive
Type 2 Error
false negative (if the hypothesis was falsely accepted)
MEAN
average of a group
MEDIAN
point in exactly the middle of a range
ex. 1-10 = median = 5
MODE
occurs most frequently
RANGE
(max) - (min)
inferential statistics
make conclusions about hypothesis
Chi-square test
determines if observed results are statistically significant. Compares observed results with expected results due to chance.
Confidence Interval (CI)
contains true mean of population. dependant on size of sample group and variety of group.
Analysis of Variance (ANOVA)
analyses 2 or more independent variables to determine interactions among sample groups.
t-test
compares the means to determine if there a significance (ratio between difference/similarity)
how many NPTs are there
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