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Ivan
2 years ago
10

The inside diameter of a randomly selected piston ring is a normally distributed random variable with mean 12 cm and standard de

viation 0.04 cm. (a) What is the diameter that is exceeded by only 5% of the piston rings
Mathematics
1 answer:
victus00 [196]2 years ago
3 0

Answer:

x=12.07

Step-by-step explanation:

From the question we are told that:

Mean \=x =12cm

Standard deviation \sigma=0.04

Significance level \alpha=5\%=0.05

Therefore

Confidence level 95\%=0.95

From table P(z

Generally the equation for Z-score is mathematically given by

z=\frac{x-\mu}{\sigma}

x=z\sigma+\mu

x=1.645*0.04+12

x=12.07

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