4. Data on CVD

• what does it mean for a data to be reliable?

  It means the data is trustworthy
• How can repeating a study affect its reliability?

  Repeating a study improves the reliability of a data
• What does it mean for data to be accurate?

  It means a data is really close to the true answer
• What is precision in data measurement?

  Precision means the data does not vary from the main due to random error
• What does repeatability in an experiment

  Refers to the same person getting the same results when repeating the experiment in the same way
• What does reproducibility example mean?

  It means a different person can repeat the experiment in a slightly different way and get the same results
• factors improve the reliability and validity of a study

  • Larger sample sizes improves reliability
  • Controlled variables improve validity
  • Less bias and collection increases reliability
  • Repetition by others enhances reproduceability
• What is accurate data?

  How close it is to the real answer
• Correlation

  The relationship between two variables
• Causal relationship

  The idea that a change in one variable directly results in the change of another variable