Measures of central tendancy Flashcards
How do you calculate the mean?
Add all numbers and divide by number of participants.
How do you calculate the median?
Order all data from smallest to biggest and find the middle number.
If two of the same number, add up and divide by two.
How do you calculate the mode?
Most frequent number in the set of data.
What is one strength of the mean and one weakness?
STRENGTH: Includes all data so more representative.
WEAKNESS: Skewed by extreme values
What is one strength and one weakness of the median?
STRENGTH: Not skewed by outliers
WEAKNESS: Can be very time consuming with large sets of data.
What is one strength and one weakness of the mode?
STRENGTH: Can be used with non-numerical data
WEAKNESS: Not useful is there is no most frequent value