Fieldwork Flashcards
what are advantages primary data
know data is reliable and valid
collect data needed and as required
what are disadvantages of primary data
time consuming
errors
limited sample size
what are advantages of secondary data
- doesn’t take long
- accurate large samples
- valid if government
what are disadvantages of secondary data
- unreliable
- over complicated
- not up to date
- no full understanding
what are advantages of qualitative data
- productive in depth analysis
- specific themes
what are disadvantages of qualitative data
- hard to analyse
- lack objectivity
what are advantages of quantitative data
- analysed statistically
- graphical
disadvantages of quantitive data
- lack of important detail
- lack validity
what is random sampling
least biased, random value from sample taken
systematic sampling
- choosing samples in regular way
stratified sampling
- dividing samples in groups
what is one advantage and one disadvantage of random sampling
can be used w large samples avoids bias
poor representation of overall population
what is one advantage and one disadvantage of systematic sampling
straight forward better coverage
biased not equal chances of selection
what is one advantage and one disadvantage of stratified sampling
used with random or systematic and flexible
hard to stratify questionnaire
hard to identify age of social background
what are the three types of spatial sampling
point
quadrant
line
how can collect information from public with its advantage
using a questionnaire asking opinions giving a wide range of views
how can you identify business of area w a benefit
count of people over period of time
allowing you to compare busyness at different time
how can you survey beach profile w benefit
using clinometer and two ranging poles record slope
allows you to see impact of processes on shape of land
how can you measure impact of swash and backwash and transportation of sediment w a benefit
measure distance between points record time for floating object to travel between points providing a direction and speed of longshore drift
how can you investigate the impact or erosion and deposition w benefit
measure width of river channel and depth at regular intervals
compare size and shape of river channels along course
how can you measure sediment along a groyne
measure height of sediment at regular intervals and allows you to identify direction of longshore drift and impact on groyne profile and on beach
how can you measure the velocity of a river w benefit
use a flow meter - allows accurate measurements
how can you take environment quality survey w benefit
develop a bi-polar scale to review quality - compare locations against same factors
when asked for advantage of disadvantages what method use
S kills required E asy to understand E quipment needed Q uantative/qualitative in depth C compareable A ccuracy P erception S subjective
