Statistics

Question 1

What does sensitivity mean?

Answer 1

The ability to detect disease, when present

Question 2

What does specificity mean?

Answer 2

The ability to identify normal, when disease is absent

Question 3

What is positive predictive value (PPV)?

Answer 3

The portion of individuals with a positive result that actually have the condition

Question 4

What is negative predictive value (NPV)?

Answer 4

The portion of individuals with a negative result that actually do not have the condition

Question 5

What is accuracy?

Answer 5

Percent of total tests measured correctly

Question 6

What is True positive (TP)?

Answer 6

Number of abnormal tests that both US and GS agree on

Question 7

What does True negative (TN) mean?

Answer 7

Number of normal tests that both the US and GS agree on

Question 8

What does False positive (FP) mean?

Answer 8

Number of tests the US deemed abnormal but the GS deemed normal

Question 9

What does false negative mean?

Answer 9

Number of tests the US deemed normal but the GS deemed abnormal

Question 10

What is the formula for sensitivity?

Answer 10

TP/ (TP+FN)

Question 11

What is the formula for specificity?

Answer 11

TN/ (TN+FP)

Question 12

What is the formula for PPV?

Answer 12

TP/ (TP+FP)

Question 13

What is the formula for NPV?

Answer 13

TN/(TN+FN)

Question 14

What is the formula for accuracy?

Answer 14

(TP+TN)/ (TP+TN+FP+FN)

Question 15

What does standard deviation mean?

Answer 15

Looks at the spread of data around any mean or average value

Question 16

What does prevalence mean?

Answer 16

The number of all cases in a population at one point in time, expressed as a ratio of the population’s size

Question 17

What is the formula for prevalence?

Answer 17

(TP+FN)/ Total cases

Question 18

What does incidence mean?

Answer 18

The rate of occurrence of new cases in a population in a defined period of time

Question 19

Label the black areas

Answer 19

Question 20

Answer 20