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Flip to reveal answersHow do you find the mean of a list?
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All 9 Flashcards — Mean, median & mode
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Question
How do you find the mean of a list?
Answer
Add all the values and divide by how many there are (Σx ÷ n).
Question
What is the median?
Answer
The middle value when the data is put in order.
Question
What is the mode?
Answer
The value that occurs most often.
Question
How do you find the mean from a frequency table?
Answer
Σfx ÷ Σf — multiply each value by its frequency, add, then divide by the total frequency.
Question
What do you divide by for the mean of a frequency table?
Answer
The total frequency Σf, not the number of different values.
Question
If the mean of n values is known, how do you get the total?
Answer
Total = mean × n.
Question
Which average is least affected by outliers?
Answer
The median.
Question
Which average is pulled toward extreme values?
Answer
The mean.
Question
When is the mode the only usable average?
Answer
For categorical (non-numeric) data, where you can't add or order values.
Read the notes
Full study notes for Mean, median & mode
Topic 4.3 hub
Central tendency & spread
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Math AA SL exam skills
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