Measures of central tendancy Flashcards
1
Q
How do you calculate the mean?
A
Add all numbers and divide by number of participants.
2
Q
How do you calculate the median?
A
Order all data from smallest to biggest and find the middle number.
If two of the same number, add up and divide by two.
3
Q
How do you calculate the mode?
A
Most frequent number in the set of data.
4
Q
What is one strength of the mean and one weakness?
A
STRENGTH: Includes all data so more representative.
WEAKNESS: Skewed by extreme values
5
Q
What is one strength and one weakness of the median?
A
STRENGTH: Not skewed by outliers
WEAKNESS: Can be very time consuming with large sets of data.
6
Q
What is one strength and one weakness of the mode?
A
STRENGTH: Can be used with non-numerical data
WEAKNESS: Not useful is there is no most frequent value
