Statistics : FInd a mean, median, mode, variance

A set of data is given by

11 23 45 42 39
56 51 17 22 29
46 33 38 33 31
29 22 26 27 26
26 51 47 25 26

FInd a mean, median, mode, variance

with detailed steps please

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Mean = 32.84 or 33
(add all values and divide by # of observations)

Median = 29
(the midpoint of the data set)

Mode = 26
(highest frequency in data set)

Variance = 114.89
(sum of x squared minus the sum of x squared divided by n then over n - 1).


** Ask a question about Attributable Risk, Attributable Risk Percentile and Odd Ratio.

i'm not going to answer the question with the exact answers because it's not difficult. Mean: Add all the data together and divide by the number of numbers in the list.
Mode: The mode is the number that appears most.
Median. Place the numbers in numerical order from lowest to highest and find the middle number, ie you have the numbers 5, 7 & 6... put them in order 5,6,7, the median will be 6. If you have an even number of numbers then the median is the middle point between the two middle numbers, ie if you have 5,6,7,8, and the median will be the middle of 6 and 7 (6.5).

This website tells you how to calculate variance: http://www.ehow.com/how_4884715_calculat…