Types of data
Is time a continuous or discrete data?
continuous data
infomation from a newspaper is primary or secondary
secondary
give a way to collect primary data
survey, interview, experiments or direct observations. oe
give a feature of a good questionaire
any 1 from: easy to understand, use simple language, no leading questions, includes time frame/ unit, includes non overlapping or exhaustive boxes. etc
give an example of non random sampling
quota, opportunity or judgement sampling
a persons age in years ( as a whole number) is discrete or continuous data
discrete data
Give the definition of primary data
information that you collect yourself oe
on which axis does the extraneous and response variable go?
extraneous does not go on any axis
response goes on y axis
what is the name used to model randoms events using random numbers and previously collected data
simulation
give an example of completely random or partially random sampling
any from: simple random, stratified, systematic and cluster
give an example of quantitative continuous data
any reasonable answer accepted
Larry is an architect who works in malaysia. he finds published data on the internet for the average dimensions of furniture in different towns across the UK from 2004. How reliable is the data?
any reasonable answer which is equivalent to: no, the data larry found is outdated and is from the wrong country.
what is another world for response variable
dependent variable
What is the difference between field and natural experiments
researcher does not change an explanatory variable in a natural experiment, instead they look at something that already exist.
In a field experiment, a researcher sets up the experiment in an everyday enviroment
what does census mean?
a survey of the entire population
A position in a race is best described as what type of data
Ordinal
give two advantages of using secondary data
any two from: cheap, easy, quick, data collected by other researches might be more accurate
define extraneous variable, response variable and explanatory variable
extraneous: the variable that you are not interested in but might affect your results
response: the variable you measure
explanatory: the variable you change
what is the formula for stratified sampling
strata/total x sample size
give an example of pilot study
the stats class from last year lol
what type of data is used on a graph
bivariate data
Give two disadvantages of using primary data
any two from, time-consuming, expensive, collection method not known.
how many columns should a data collection sheet have? list them
3, subject, tally and frequency
What is an advantage of stratified sampling
sample is in proportion to population, population is represented fairly
In the petersen capture recapture what does the lower case m stand for?
number of members in the second capture that are tagged