Chapter 1 STATS - Data Collection

Question 1

define: population

Answer 1

the whole set of items that are of interest

Question 2

give one advantage and disadvantage of using a census

Answer 2

advantage: gives completely accurate results

disadvantage: time consuming

Question 3

give one advantage and disadvantage of using a sample

Answer 3

advantage: less data to process than a census

disadvantage: data may not be as accurate

Question 4

advantage and disadvantage of: simple random sampling

Answer 4

advantage: free of bias

disadvantage: sampling frame is needed

Question 5

advantage and disadvantage of: systematic sampling

Answer 5

advantage: quick to use

disadvantage: sampling frame needed

Question 6

advantage and disadvantage of: stratified sampling

Answer 6

advantage: accurately reflects population structure

disadvantage: population must be clearly classified into distinct data

Question 7

advantage and disadvantage of: quota sampling

Answer 7

advantage: no sampling frame needed

disadvantage: can introduce bias

Question 8

advantage and disadvantage of: opportunity sampling

Answer 8

advantage: easy to carry out

disadvantage: unlikely to provide representative sample

Question 9

what is: systematic sampling

Answer 9

the required elements are chosen at regular intervals from an ordered list

Question 10

what is: stratified sampling

Answer 10

the population is divided into mutually exclusive strata and a random sample is taken from each

Question 11

what is: quota sampling

Answer 11

when a researcher selects a sample that reflects the characteristics of the whole population

Question 12

what is: opportunity sampling

Answer 12

taking a sample from people available at the time that the study is being carried out and fit the criteria you are looking for