Group 6
mv
Created on August 13, 2021
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Transcript
START
JAMES JACKSON MICHAEL VINCENTVANESSA PUTRI GUNAWANVINCENT J. RUNTUNG
Group 6 : Qualitative & Quantitative Research - Sampling Methods
SAMPLING METHODS
quANTITATIVErESEARCH
Qualitative Research
Index
Qualitative and Quantitative Research
SECTION 01
- Based on quality
- Collecting and analyzing non-numerical data
- To understand opinions and experiences
- Collects data based on observations of what people do and say → observations, interviews, focus groups
- Very subjective (high degree of interpretation)
- Since it is very subjective → a lot of disagreements
Qualitative Research
WHO IS BETTER?
Disadvantages
- Bias → data collected based on opinions
- Create misunderstandings → different interpretations as it is very subjective
- It is not valid forever → opinions might change
Advantages
- Open ended → no right or wrong answers (opinions)
- Incorporates human experience → socialize
BACK
Title here
Title here
Sample 1
- Based on quantity (numbers)
- Can be measured statistically
- Collects data based on measurements
- Objective → only reports data based on the
Quantitative Research
Presidential election
Scientific Experiment
Example
BACK
- Accuracy and precision → wrong measurements leads to uncertainty
- Miscalculation → If you miscalculate something you have to recalculate it or else your data will not be valid
Disadvantages
Advantages
- Reliable / can be checked and tested → since it is only
- Straightforward analysis → less open to error and subjectivity
BACK
Advantages and Disadvantages
Advantages:
- Easier and faster
- Represents the target population and eliminate sampling bias
- Difficult to gain access to a list of larger population and time cost
Random Sampling
- Each sample has an equal probability of being chosen
- Sample selected at random, meant to be an unbiased representation.
Advantages:The most effective methods in almost all casesCan be easily administered and helps in quick comparisonDisadvantages:It is not possible to estimate the sampling errors
Advantages and Disadvantages
- Data is collected from a similar group
- Involves target population being divided into number of groups that share specific characteristics
Quota Sampling
Advantages:
- A stratified sample can provide greater precision than a simple random sample of the same size.
- requires a smaller sample, which saves money.
- The strata may overlap if they are not clearly defined
- Random but the total population is divided into smaller groups to complete the sampling process
- These groups are based on certain criteria, then randomly choose elements from each in proportion to the group's size versus the population.
Stratified Sampling
bACK
Random sampling : Choosing 5 names from 30 random friendsQuota sampling : For example candy factory wants to know what age likes their candies.They can group it by quota of 5-10, 11-15, 16-20, 21-25, 26-30, 30+ Stratified sampling : Grouping a group before randomly choose it, like listing person nationality before picking it.
Example :
Thanks!