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

• 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