Data and variables

Question 1

define data

Answer 1

pieces of information that can be arranged into variables

Question 2

each experiment/study makes a

Answer 2

dataset

Question 3

define: variable

Answer 3

factor that can change (both within and between patients)

Question 4

non random/algebraic variable + example

Answer 4

can be predicted
described by an equation

age, sex, height

Question 5

random variable

Answer 5

can’t be predicted
obtained through random sampling

blood pressure, blood sugar levels

Question 6

define: observation

Answer 6

in one patient at one point in time:

• 1 variable
• all variables

Question 7

two major types of variables?

Answer 7

categorical and numerical

Question 8

difference between categorical and numerical

Answer 8

numerical - data not categoried

categorical - data organised into categories

Question 9

two types of categorical

Answer 9

nominal and ordinal

Question 10

whats nominal

Answer 10

not ordered

or binary

Question 11

whats ordinal

Answer 11

ordered - high medium low

Question 12

whats discrete

Answer 12

whole numbers
number of people
number of times something happens
NOT number of days (considered as time)

Question 13

whats continuous

Answer 13

all numbers
time
height, age, weight etc