Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the corre
1 answer:
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Answer:
Step-by-step explanation:
Given that,
μ = 25.1
σ = 0.26
a) since standard deviation is ideal measure of dispersion , a combination of control chart for mean x and standard deviation known as
Chart is more appropriate than and R - chart for controlling process average and variability
so we use
charts
b)
n = 11
we have use 2 σ confidence
so, control unit for chart are
upper control limit =
lower control limit =
control limit = μ
μ = 25.1
upper control limit =
lower control limit =
Upper control limit and lower control limit are in between the specification limits , that is in between 24.9 and 25.6
so, process is in control
c) if we use 3 sigma limit with n = 11
then
upper control limit =
lower control limit =
control limit is 25.1
Then, process is in control since upper control limit and lower control limit lies between specification limit
So, process is in control