TB3 + TB4 RM Key formulas

HideShow resource information
  • Created by: mint75
  • Created on: 18-05-15 16:46
View mindmap
  • RM Key Formulas
    • Standard error of the mean (SEM)
      • The standard deviation of the sample, divided by the square root of n
      • A measure of how well the sample mean estimates to the population mean
    • Variance
      • Sum of the deviations from the mean squared, and divided by n-1
      • Used for describing the spread or variability across scores
    • Standard deviation (SD)
      • The square root of the variance
        • Variance
          • Sum of the deviations from the mean squared, and divided by n-1
          • Used for describing the spread or variability across scores
      • Describes how much scores differ from the mean
    • Z-Scores
      • The score you're comparing - mean, divided by standard deviation
        • Standard deviation (SD)
          • The square root of the variance
            • Describes how much scores differ from the mean
        • How to view the score in comparison to the rest of the data set (e.g did she do better in test A than test B compared to the rest of class
      • Confidence Intervals
        • Multiply the mean by the confidence interval you are looking for e.g 95% confidence, upper limit = 64x1.05, lower limit = 64x0.95
        • Indicates how confident you are that the true value will lie under x of the curve, e.g if you are 95% confident that it is between 30-50, 30-50 is the confidence interval

    Comments

    No comments have yet been made

    Similar Psychology resources:

    See all Psychology resources »See all Y1 RM resources »