Its the sum of all of the numbers divided by the count of numbers. Write the range of the given set of data. Summary For grouped data we cannot find the exact Mean Median and Mode we can only give estimates.
To find the mean add all the numbers together then divide by the number of numbers.
The mean is the arithmetic average of a set of given numbers. Next divide the sum by however many numbers you added. The mean is the arithmetic average of a set of given numbers. The mean the median and the mode are each seven for these data.