Question: You receive 7 calls in 1 h on the first day. Phone calls used to arrive at an average rate of 3.5/h, but after posting

You receive 7 calls in 1 h on the first day.
Phone calls used to arrive at an average rate of 3.5/h, but after posting your number on your Web page, you receive more calls on subsequent days. For each day,
a. State null and alternative hypotheses.
b. Use the Poisson distribution to compute the probability of this event if the null hypothesis is true.
c. Compute the probability of an event at least this extreme if the null hypothesis is true.
d. Is this result significant? How would you interpret it?

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