Population, Sample, Sample Size, Parameter, Statistics

• Population - group where numbers have something in common, that is, the total set of observation that can be made - G11 SHS Students
• Sample - a smaller group or subset of the population in question - 12 G11 SHS STUDENTS
• Sample Size - number of observations or individuals included in a study or experiment/# of values
• Criteria in Determining the Sample Size:

  1. Level of Precision (Margin of Error) - refers to the detail or exactness of a measurement
  2. Level of Confidence - the probability that the sample obtained is the representative of the true population value
  3. Degree of Variability - measure the spread or dispersion of data points around the central tendency - how much variance do you expect in your research ( p = .5 )
• Parameter - describes an entire population

  1. 45% of senior citizens in Metro Manila are male
  2. The average daily wage of all employees of certain company is 585 pesos
• Statistic - describes only the sample

  1. 25 out of 100 randomly chosen grade 11 students belong to STEM strand