finding grouped mean: you normally have a table like this : VISITS FREQ SUM <--to work out this, you times visits by freq. 0 5 0 <-- 1 13 13 <-- 2 21 42 <-- 3 7 21 <-- 4 4 16 <-- 50 92then work out the totals by adding them up (as shown) working out mean you have to do sum total / freq total mean= 92/50 hope this helped Claire, 15
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Mean = a + [
Not sure what a "grouped of data" means!
Mean, median and mode are ways to find averages. The mode is the most common answer in a set of data. The median the number that is in the middle when the numbers are put in order. The mean is the statical average.
Data can be grouped or ungrouped. The categories data are grouped in depend on the data. For example, data collected about people could be grouped as male/female, by ages, or some other common characteristic. Data collected about dogs could be grouped by breed of dog, age, long hair/short hair, or size.