descriptive statistics

Cards (10)

what are the 3 measures of central tendency
mean, median, mode
what is the mean
add up all results and then divide them by the number of results there were. the average of the group
advantages of the mean
you dont have to put the data in order, mean is a very descriptive value
disadvantages of the mean
may end up with a decimal number. can be skewed due to an outlier
what is the median
order all results from smallest to largest and find the middle number
advantages of the median
not affected by one outlier, combined with mean it can be a very descriptive tool
disadvantages of the median
must put the number in order of smallest to largest, the way you find the mean differs depending on how many numbers in group
what is the mode
the most common
advantages of the mode
you dont have to put the data in order, no calculations necessary
disadvantages of the mode
is possible to have no mode, one mode or many, not great description of data