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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

3

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