Suppose We Use a "Run of Eight" Rule;that Is,we Declare

Multiple Choice

Suppose we use a "run of eight" rule;that is,we declare the process out of control if eight consecutive points are all above the center line of the chart or if eight consecutive points are all below the center line of the
Chart.If the process is in statistical control,what is the (approximate) probability that we declare the process out of control using this rule?

A) 0.001
B) 0.004
C) 0.008
D) 0.05