BIOSTATS

Question 0

Type 2 error

Answer 0

Said no difference when there was a difference

False-negative

Increase power and duration to prevent

Question 1

Type 1 error

Answer 1

Said there was a difference and there wasn’t

False positive

Question 2

Power

Answer 2

Power equals one minus b

Question 3

Nominal data

Answer 3

Yes or no

Question 4

Ordinal data

Answer 4

Ranking

Question 5

Interval data

Answer 5

Temperature is an example no real zero

Question 6

Ratio data

Answer 6

Has a real zero examples are height weight time and length

Question 7

Statistical test used for nominal data

Answer 7

Chi-square or Fisher exact test

Question 8

Statistical test used for ordinal data

Answer 8

Wilcoxon rank sum test or mann Whitney u test

Question 9

Ratio and interval data statistical test

Answer 9

Students t-test and anova

Question 10

Relative risk or risk ratio

Answer 10

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

Question 11

Relative risk reduction

Answer 11

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

Or 1-rr

Question 12

Absolute risk reduction

Answer 12

% risk in control group -% in treatment group

Question 13

Number needed to treat

Answer 13

1/ARR