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The following table provides a probability distribution for the random variable y 3 5 7 8 f(y) 0. 10 0. 30 0.40 0. 20 Oa. Compute E(y) (to 1 decimal). 6.2 b. Compute Var(y) and σ (to 2 decimals). C Var(y)
In San Francisco, 30% of workers take public transportation daily (USA Today, December 21, 2005). a. In a sample of 7 workers, what is the probability that exactly three workers take public transportation daily (to 4 decimals including interim calculations)? b. In a sample of 7 workers, what is the probability that at least three workers take public transportation daily (to 4 decimals including interim calculations)?
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