ch 2- recording and analysing data, drawing and communicating conclusions Flashcards
primary data
data collected through first hand research for an intended purpose
secondary data
data obtained second hand through research conducted by another person for another purpose
qualitative data
data that describes characteristics and qualities
quantitative data
data that includes measurable values and quantities and can be compared on a numerical scale
percentage
a part of a whole, a proportion out of 100
percentage change
a calculation of the degree of change in a value over time
measures of central tendency
category of statistics that describes the central value of a set of data
mean
a statistic that is the average value of a set of data
median
the middle value in an ordered set of data
mode
value that occurs most frequently within a set of data
measures of variability
category of statistics that describe the distribution of data
standard deviation
spread of the data around the mean
tables
a way to display data and or summarise statistics clearly
bar charts
a way to display data with discrete categories
line graph
a way to display numerical and continuous data
true value
the true value or range of values that would be found if the quantity could be measured perfectly
accuracy
how close a measurement is to the true value of the quantity being measured