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zhannawk [14.2K]
3 years ago
10

If the number of observations for each sample is 150 units, what is the 3-sigma upper control limit of the process

Mathematics
1 answer:
bixtya [17]3 years ago
3 0

Complete Question

Complete Question is attached below

Answer:

UCL= 0.25

Step-by-step explanation:

From the question we are told that:

Sample sizen=150

Sample Variants s=7

Sigma control limits  Z = 3

Therefore

Total number of observations is Given as

T_o=n*s

T_o=150 *7

T_0=1050

Generally

Summation of defectivee

\sum np=23+34+15+30+25+22+18

\sum np= 167

Generally the equation for P-bar is mathematically given by

P-bar=\frac{\sum np}{T_o}

P-bar=\frac{167}{1050}

P-bar=0.16

Therefore

Sp=\sqrt{\frac{P-bar(1-P-bar)]}{ n}}

Sp=\sqrt{\frac{[0.159(1-0.159)]}{150}}

Sp=0.03

Generally the equation for 3-sigma upper control limit of the process is mathematically given by

UCL = P-bar + Z*Sp

UCL= 0.16 + 3*0.03

UCL= 0.25

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