Distribution curves

• Normal distribution: When scores are clustered around the mean, median and mode. All measures of central tendency are at the midpoint.
• The normal distribution has a bell shape
• Skewed distribution curve: When the mean, median and mean are not the same
• In a positive skew, most of the scores are bunched towards the left, with the mode being to the left of the mean, as the mean is affected by extreme scores going to the right
• In a negative skew, most of the scores are bunched towards the right, with the mode to the right of the mean, as the mean is affected by extreme scores on the left