Topic 6 - Fieldwork Flashcards
Define annotate
to add notes and explanations to a photograph, map or diagram topic
Define bivariate data
data with two sets of variables
Define contour
a line on a map joining places of equal height above sea level
Define correlation
when two variables in the data set are linked
Define frequency
the number of times an event or data value occurs
What is geographical information systems (GIS)?
a form of electronic mapping that builds up maps layer by layer
What is a grid reference?
a four or a six figure reference number used to locate features on an OS map
What is the inter-quartile range?
the difference between the upper and lower quartiles
What is the line of best fit?
a line going through the middle of the points on a scatter graph
What is the lower quartile?
divides the bottom half of the data in two halves; the bottom quarter of a set of values
Define the term ‘mean’
the sum of the data values divided by their number, often called the average
Define median
the middle value when a set of values in a data set is written in order
Define modal
class the most frequent class in a data set
Define mode
the most frequent value in a data set
What is primary data?
data that you collect first hand
Define proportion
expresses one part as a fraction of the whole
Define qualitative data
data without numbers based on people’s opinions or ideas, for example an interview or field sketch
Define quantitative data
contains numbers and figures, for example a pedestrian count
Define quintile
a way of analysing the distribution of income in a country for each fifth (quintile) of the population
What is random sampling?
data that is collected so each has an equal chance of being selected, for example by using random numbers
Define range
the difference between the smallest and biggest values
Define ratio
shows the number of times one value occurs compared with another
What is scale?
the relationship between dimensions on a map or diagram to those in the real world. On OS maps this is shown as 1:25,000 or 1:50,000
Define secondary data
data that has been collected and published by someone else
