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The length of time to complete a door assembly on an automobile factory assembly line is...

The length of time to complete a door assembly on an automobile factory assembly line is normally distributed with a mean of 6.7 minutes and a standard deviation of 2.2 minutes. For a door selected at random, what is the probability that the time it takes to assemble will be:

  1. a.) 5 minutes or less?

  2. b.) 10 minutes or more?

  3. c.) Between 5 and 10 minutes?

  4. d.) What is the maximum amount of time it takes to complete a door assembly when considering only the fastest 10% of assembly times?

Math   Statistics-And-Probability   
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Answer #1

I will be using excel to solve the problems. The answers are as follows, along with the formulas used:

Let me know in the comments if anything is not clear or any concerns. I will reply ASAP! Please do upvote if satisfied!

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