QUALITY CONTROL1)Specifications for a part for a DVD player state that the part should weigh between 24.6 and 25.6 ounces. The process that produces the parts has a mean of 25.1 ounces and a standard deviation of .26 ounce. The distribution of output is normal. a)What control chart will you use and why?b)With a 2-sigma confidence, what are the upper and lower control limitsif sample of n = 11are taken and the process is in control (random)?c)Is the process in control

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

the anwser is d) 75°

step-by-step explanation:

hi how are you doing today, if you need just ask me.

step-by-step explanation: