Statistics

• Sampling


  Method in selecting the sample
• Probability


  Everyone is selected
• Non-Probability


  Limited Selection only
• 2 types of Sampling

  Probability and Non-Probability
• Simple Random Sampling (SRS) is a sampling technique that involves selecting a sample from a population by randomly selecting a sample of individuals from the population.
• Cluster Sampling is a method of sampling in which a sample is drawn from a group of individuals that are similar to the population, they are clustered or group already.
• Stratified Sampling is a sampling technique that involves dividing a population into subgroups and then selecting a sample from each subgroup. (every cluster has a representative)
• Systematic Sampling is system are involved, an arrangement of the population is made, and the sample is selected from the arrangement.
• Types of Probability

  • Simple Random Sampling (SRS)
  • Cluster Sampling
  • Systematic Sampling
  • Stratified Sampling
• Non-probability sampling is when the sample is not representative of the population as a whole. It uses sensitive topics or studies.
• Types of Non-probability

  • Purposive Sampling
  • Snowball Sampling
  • Convenient Sampling
• Purposive Sampling is when the researcher selects participants based on their ability to answer the research question. There is a purpose why the researcher conducted the study.
• Snowball Sampling is a technique that involves asking people to ask others to ask others, and so on, until a sample is obtained. No specific no. of respondent.
• Convenient Sampling is when the researcher selects a sample that is convenient for them.
• Experiment is a process/activity repeated under the same condition, which generates well defined outcomes.
• Outcome is the possible result of the experiment/activity.
• Sample Space is a set of all possible outcomes of a random experiment. Each outcome of the sample space is called a possible outcome, element or sample point.
• Event is the subset of the set of all possible outcomes of a random experiment.
• Mutually Exclusive - A condition in which two or more events cannot occur simultaneously.
• Mutually Inclusive - Allow both events to happen at the same time or to occur in a single trial.
• How many does the number of deck of cards?

  52
• How many does the possible outcomes of a rolling a die?

  6
• What is the sample space of flipping a coin?

  {H,T}