Summary of "Lecture 3.3 - Describing Numerical Data - Median and Mode"
Median is the middle value in an ordered data set that divides it into the bottom 50% and top 50%.
To compute the median, arrange data in increasing order, and if the number of observations is odd, the median is the middle value. If the number of observations is even, the median is the average of the middle two values.
The median is not sensitive to outliers compared to the mean.
Mode is the value that appears most frequently in a data set.
Adding a constant to a data set does not change the median, but the new mode is the old mode plus the constant.
Multiplying the entire data set by a constant results in the new mode being the old mode multiplied by the constant.
Speakers/sources
- Not mentioned.
Category
Educational
