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Shirts-R-Us looked at the sales for the week 48 bought t-shirts, 36 bought dress shirts, and...

Shirts-R-Us looked at the sales for the week 48 bought t-shirts, 36 bought dress shirts, and 36 bought sweaters.If they pick 4 customers at random

  1. (5pts) create a probability distribution that tracks the number who bought dress shirts
  2. find the mean of the number who bought dress shirts
  3. find the variance of the number who bought dress shirts
  4. find the standard deviation of the number who bought dress shirts
  5. P [ x ≤ μ − σ ]
  6. theoretically, what is the probability that the number of those who bought dress shirts is between
Math   Statistics-And-Probability   
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