Presentation of Data

• What are the different methods for presenting and displaying data?

  Graphs, tables, scattergrams, bar charts, histograms, and distributions
• What type of data is represented in bar charts?

  Discrete data
• What do scattergrams show us?


  Associations or correlations between variables
• What are the types of correlations shown in scattergrams?

  • Positive Correlation
  • No Correlation
  • Negative Correlation
• What characterizes a normal distribution?

  A symmetrical arrangement of data forming a bell-shaped pattern with the mean, median, and mode at the center
• What is a positive skew in a distribution?

  A distribution where most participants score low marks, leaving a tail of anomalous high scorers
• How does the mean behave in a positively skewed distribution?

  The mean is pulled to the right by the higher scores being the minority
• What is a negative skew in a distribution?

  A distribution where most participants score very highly, leaving a tail of anomalous low scorers
• How does the mean behave in a negatively skewed distribution?

  The mean is pulled to the left by the lower scores being the minority
• What is a key feature of histograms?

  The bars touch to indicate that the data is continuous
• What should you do when observing data from a balcony for a study?

  • Think of something to observe
  • Consider two things to compare
  • Assess these for a correlation
  • Record raw data in a table
• What is the purpose of drawing conclusions after observing data?

  To analyze the observations and identify patterns or correlations