Question

Over 500 million tweets are sent per day (Digital Marketing Ramblings website, December 15, 2014). Assume that the number of tweets per hour follows a Poisson distribution and that Bob receives on average 7 tweets during his lunch hour a. What is the probability that Bob receives no tweets during his lunch hour (to 4 decimals)? b. What is the probability that Bob receives at least 4 tweets during his lunch hour (to 4 decimals)? For this question, if calculating the probability manually make sure to carry at least 4 decimal digits in your calculations. c. What is the expected number of tweets Bob receives during the first 30 minutes of his lunch hour (to 1 decimal)? d. What is the probability that Bob receives no tweets during the first 30 minutes of his lunch hour (to 4 decimals)? Check My Work (2 remaining)

Answer 1

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P(x-2)' -구 2 戈1 (0,029 (18)(49) 2 Ow, p(x-3) -7 3 31 r(c.co09118)(Мз)

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3.5 CO tl 3.5 Pobabiữu that hofveetneuved atomenu tent&003019"