The Diameter of Small Nerf Balls Manufactured at a Factory

question 31

Multiple Choice

The diameter of small Nerf balls manufactured at a factory in China is expected to be approximately normally distributed with a mean of 5.2 inches and a standard deviation of .08 inches.Suppose a random sample of 20 balls is selected.Find the interval that contains 95.44 percent of the sample means.

• A)[5.04,5.36]
• B)[5.18,5.22]
• C)[5.16,5.24]
• D)[5.07,5.33]

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