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A researcher proposes to model daily coffee consumption among college students by a normal distribution with...

A researcher proposes to model daily coffee consumption among college students by a normal distribution with mean 20 oz and a standard deviation 4 oz.

  1. What is the probability that a randomly selected student will have coffee consumption in the range [mean-SD, mean+SD]?

2. Verify your answer by using R. Generate 1 million random samples from the normal distribution with appropriate mean and SD.

Does the normal distribution is in between[ 20-4, 20+4]?? For the R code will that be possible to start it with  "coffee <- rnorm(1000000,20,4)" to verify the answer?

  

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