Advantages and disadvantages

Question 1

Adv of census

Answer 1

accurate

Question 2

disadv of census (2)

Answer 2

time consuming

too much data

Question 3

Adv of random sampling

Answer 3

minimises biased

Question 4

Disadv of random sampling

Answer 4

not suitable for small frames

Question 5

Adv of systematic sampling (3)

Answer 5

Easiest
Most suitable for large amounts of data
biased avoided

Question 6

Disadv of systematic sampling

Answer 6

can be biased

Question 7

Adv of stratified sampling

Answer 7

Most representative of whole population

Question 8

Disadv of stratified sampling (3)

Answer 8

time consuming
difficult to get strata
random within each strata

Question 9

adv of quota sampling

Answer 9

no sampling frame

Question 10

disadvantage of quota sampling (2)

Answer 10

Biased

Finding distinct groups is difficult

Question 11

Adv of opportunity sampling (2)

Answer 11

easy

inexpensive

Question 12

Disadv of opportunity sampling (2)

Answer 12

unlikely to provide a representative of the whole population

dependent on the individual

Question 13

adv of using the mode (2)

Answer 13

easiest

for qualitative and quantitative data

Question 14

disadvantage of mode (2)

Answer 14

not representative

there isn’t always a mode

Question 15

adv of median

Answer 15

not affected by outliers

Question 16

disadvantage of median

Answer 16

not representative of whole data set

Question 17

adv of mean

Answer 17

uses all the data

Question 18

disadvantage of mean

Answer 18

affected by outliers

Question 19

adv of stem and leaf diagrams

Answer 19

ordered, raw data

Question 20

averages which go well together (2 pairs)

Answer 20

median + interquartile range

mean + standard deviation