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How do you calculate the lower quartlie of a data set?
By using the basic definition of a quartile. Sort the data, count how many there are in total, then count off one quarter of that. For example, if you have 80 data items, count off the first 20 items (after sorting).
If there is a zero in the data set do you supposed to count the zero in?
If it's a member of the data set, then it's a data point. If you decide to ignore it as if it was never there, then you're altering the characteristics of the data, and no analysis you do will reflect the true data.
How to work out mode?
Take your dataArrange it so that you can count or tally the occurrence of each unique data itemFinalise your tally - the unique data item with the highest count is the mode.Sometimes you may find that you have more than one mode - i.e. there are two or more unique data items that have the same highest tally
What is the mean of this data 5 3 8 2 6?
Mean = Sum/Count = 24/5 = 4.8
What is the balance point of the data set of 2 4 5 6 9 10?
It is the mean which is the Sum/Count = 36/6 = 6
