A run chart has recorded the following values (assume 95% confidence)

10, 8, 6, 14, 16, 14, 18, 20, 8, 10, 10, 10.

Calculate:

a) the actual number of runs

b) the expected number of runs

c) the centerline plotted value

d) would this data pass a runs analysis test?

I can't find any formulas to be able to answer these run chart questions. Can anyone help?

Regards,

leaning