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Flashcards in BIOSTATS Deck (14)
0

Type 1 error

Said there was a difference and there wasn't

False positive

1

Type 2 error

Said no difference when there was a difference

False-negative

Increase power and duration to prevent

2

Power

Power equals one minus b

3

Nominal data

Yes or no

4

Ordinal data

Ranking

5

Interval data

Temperature is an example no real zero

6

Ratio data

Has a real zero examples are height weight time and length

7

Statistical test used for nominal data

Chi-square or Fisher exact test

8

Statistical test used for ordinal data

Wilcoxon rank sum test or mann Whitney u test

9

Ratio and interval data statistical test

Students t-test and anova

10

Relative risk or risk ratio

Risk in treatment group divided by risk in control group

If equal to one no difference
If less than one less likely to occur in treatment group
If greater than one the event is more likely to occur in the treatment group

11

Relative risk reduction

Percent risk in control group minus percent risk in treatment group divided by percent risk in control group

Or 1-rr

12

Absolute risk reduction

% risk in control group -% in treatment group

13

Number needed to treat

1/ARR