[Solution] In a manufacturing process a random sample of 36 bolts manufactured has a mean length of 3 inches with a standard deviation of .3 inches. What is


Question: In a manufacturing process a random sample of 36 bolts manufactured has a mean length of 3 inches with a standard deviation of .3 inches. What is the 99% confidence interval for the true mean length of the bolt?

  1. 2.902 to 3.098
  2. 2.884 to 3.117
  3. 2.871 to 3.129
  4. 2.228 to 3.772
  5. 2.902 to 3.098

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