Statistics Flashcards
How do you work out the mean of listed numbers?
Add them all together and divide by how many numbers there are
How do you work out the range of listed numbers?
Subtract the smallest number from the largest one
How do you work out the median of listed numbers?
Put the numbers in order then find the middle value
How do you work out the mode of listed numbers?
Find the most commonly occurring number
What is the mode of this list?
1, 2, 3, 3, 5, 6, 7, 8, 11
3
it is the most common data item
What is the median of this list?
1, 2, 3, 3, 5, 6, 7, 8, 11
5
it is the middle value when the list is ordered
What is the range of this list?
1, 2, 3, 3, 5, 6, 7, 8, 11
10
the range is the highest value subtract the lowest value so 11-1 = 10
What is the mode of this list?
1, 2, 3, 3, 5, 6, 7, 8, 8, 11
3 and 8
it is possible to have two modal values
What is the mode of this list?
1, 2, 3, 3, 5, 6, 7, 8, 8, 11
5.5
5 and 6 are the middle values in the list, the number in the middle of 5 and 6 is 5.5 so 5.5 is the median
