where:
s = series number
i = point number in series s
m = number of series for point y in chart
n = number of points in each series
= data value of series s and the ith point
= total number of data values in all series
M = arithmetic mean
Standard error
where:
s = series number
i = point number in series s
m = number of series for point y in chart
n = number of points in each series
yis = data value of series s and the ith point
ny = total number of data values in all series