BNAD 276 Lecture Notes - Lecture 5: Multimodal Distribution, Central Tendency, 2Degrees

• School: University of Arizona
• Department: Business Administration
• Course: BNAD 276
• Professor: Suzanne Delaney

Document Summary

Review: mean (average): the balance point of a distribution. If there appears to be two medians, take the mean of the two: mode: the value of the most frequent observation, bimodal distribution: if there are two most frequent observations. Measure of central tendency: describes how scores tend to cluster toward the center of the distribution, mode = tallest point, median = middle score, mean = balance point. In a normal distribution: mode = mean = median. Positively skewed distribution: right-skewed, positive skew = it has a long tail in the positive direction, note: mean is most affected by outliers or skewed distributions. In a positively skewed distribution: mode < median < mean. Negatively skewed distribution: left-skewed, negative skew = it has a long tail in the negative direction, note: mean is most affected by outliers or skewed distributions. In a negatively skewed distribution: mean < median < mode.