Mean, Median, Mode Flashcards
What is the mode
The number that appears the most often
What is the median
In an order list of values the median is the value in the middle position
What is the equation for median
(N+1)/2
What Happens if you add a value that’s greater/smaller than median
It might increase/decrease
What happens if you remove a data value that is greater/ smaller than the median
Median might decrease/increase
What happens if you add or remove a value that is smaller than the median and one that is greater
The median stays the same
What is the arithmetic mean
The average
How do you find the arithmetic mean
Add together all the data values and divide it by the total number of values in the sample
Mean equation
Sum of numbers / number of values
When does the mean change
If you add or remove the data value from the sample
When does the mean not change
If the number added is equal to the mean itself
When does the mean increase
If you add a value greater than the mean
Take away a value less than then mean
When does the mean decrease
If you add a value less than the mean
Take away a greater value than the mean
Advantages of means
Uses all the data
usually most representative
Disadvantages of means
Isn’t always data value
distorted by extreme values
