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JAMES JACKSON
MICHAEL VINCENT
VANESSA PUTRI GUNAWAN
VINCENT J. RUNTUNG
Group 6 : Qualitative & Quantitative Research - Sampling Methods
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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
numbers and statistics from previous measurements

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
based on facts the data will be very reliable and unbiased
  • Straightforward analysis → less open to error and subjectivity

BACK

Advantages and Disadvantages

Advantages:

  • Easier and faster
  • Represents the target population and eliminate sampling bias
Disadvantages:
  • 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.
Disadvantages:
  • 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!

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