Unit 1 Flashcards
What is primary data?
the data that is collected for the first time through personal investigation
What is secondary data
Secondary sources of information already found by other people
What is qualitative data?
Non-numerical observations such as rainy, exciting….
What is quantitative data?
Numerical or measurements such 10,5,2,0.9…..
What is discrete data?
Fixed amounts (shoe size)
What is continuous data?
Measurements or numbers that can change
Give an example of continuous data
Height, weight, temperature
Give an example of qualitative data
Rainy, dry,big
Give an example of discrete data
Shoe size
What is the definition of population
all the people or items that can be considered in the study.
Give two Advantages of primary data.
Accuracy is known
Collection method is known
Give two disadvantages of secondary data
Method of collection unknown
May contain mistakes
Give two advantages of secondary data
Easy to obtain
Cheap to obtain
Give two disadvantages of primary data
Time consuming to collect
Can be expensive to collect
What is a sampling frame
a list of all the sampling units
Two advantages of a census
Completely accurate
Not bias
Give two disadvantages of a census
Time consuming
Expensive
Give an reason for a pilot survey
Ensure respondents understand your questions
To make sure it is not offensive
Learn how to carry out systematic sampling
Do practice questions
What is judgement sampling
Using your judgment to select a sample.
What is a sampling unit
All the people or items that are to be sampled
What is a control group
Is randomly selected and is used to help test the effect of various factors
What does cleaning data mean
Identifying outliers
Removing units
Deciding what to do with missing data
what should I say if it asks the appropriateness of someones plan to collect data
mention many flaws with it such as for example
extraneous variables
sample size
what to do with outliers
data presentation
