Measures of Central Tendency
-
A measure of central tendency is a single value that attempts to describe a set of data by identifying the central position within set of data.
-
Central tendency are also referred as measures of central location & also as summary of statistics
-
The valid measures of central tendency are
- mean:
- Simple average of all the values in the distribution
- Mean calculated over the population is represented by μ & Mean of sample is represented by x̄
- median:
- The median is the middle number in an ordered dataset
- The median is the number at position (n+1)/2
- mode: This is value which appears often in the dataset
- mean:
-
Calculate Mean, Median and mode for the salary sample in hyderabad Refer Here
Skewness
- This is measure of asymmetry that indicates whether the observerations in dataset are concentrated in one side
- Refer Here for the excel sheet
- Exercise: Try to find the skewness and also plot as shown in the above image for the excel Refer Here