Statistics

Question 1

Sensitivity

Answer 1

Identify True Positive with disease

TP/(TP + FN)

Question 2

Specificity

Answer 2

TN/(TN +FP)

Question 3

Biological variable

Answer 3

Age, sex, height, weight, BMI, blood type, temp, disease severity, number of teeth, heart rate

Question 4

Ordinal variable

Answer 4

Ordered but meaningless difference
Exam grade, likert scale,
Stages of cancer
Education level, elementary, secondary, college

Question 5

Nominal variable

Answer 5

One category is not better than other:
Gender male, female
Eye color- blue, green
Surgical outcome- live, dead

Question 6

4 P in marketing

Answer 6

Product
Place
Price
Promotion

Question 7

Risk reduction

Answer 7

1. Absolute Risk

2. Relative Risk

Question 8

Absolute Risk Reduction (ARR)

Answer 8

Risk in control - Risk in treatment

Question 9

Relative risk RR

Answer 9

Risk in treatment/ Risk in control

Question 10

Relative Risk Reduction

Answer 10

1-RR

Question 11

Number need to be treated NNT

Answer 11

1/ARR

Question 12

Gross profit margin %

Answer 12

Gross profit = Sales - Cost of Goods

Gross margin = (Gross profit/ Sales)*100

Gross margin = (Sales -Cost of goods)/Sales

Question 13

Calculate gross profit margin for pharmacy if u purchased goods by 10000 and Sold by 118000

Answer 13

Profit = 11800-10000=1800

Gross profit margin = (1800/118000)*100 = 15%

Question 14

Type I error

Answer 14

False positive; Reject null hypnosis when it is true
State difference when there is no difference.
Null hypnosis is true BUT you reject Null

Question 15

Type II error

Answer 15

False Negative; Fail to Reject null hypnosis when it is false
State NO difference when there is difference.
Null hypnosis is False BUT you fail to reject.

Question 16

Null hypothesis

Answer 16

No statistical difference between 2 groups