# probability

posted by .

An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of 6.4 emails per hour. Assume the arrival of these emails is approximated by the Poisson distribution.

(a)
What is the probability Linda Lahey, company president, received exactly 1 email between 4 P.M. and 5 P.M. yesterday? (Round your answer to 4 decimal places.)

(b)
What is the probability she received 8 or more emails during the same period? (Round your answer to 4 decimal places.)

(c)
What is the probability she received four or less emails during the period? (Round your answer to 4 decimal places.)

## Similar Questions

1. ### Statistics

1. Use the following to answer questions: The table below presents the probability distribution for X = the number of email messages you will receive in the next 10 minutes. (9 pts) X 0 1 2 3 P(X) .35 .35 .25 .05 a. What is the probability …
2. ### Statistics

2. The arrivals of customers at a drive-in banking window are governed by the Poisson distribution. Each customer requires 5 minutes to transact his or her business at the drive-in window. The average customer arrival rate is 10 per …
3. ### java programing

If you were writing a program application that was harvesting people's emails and telephone numbers, explain and demonstrate how you would validate the individual emails and telephone numbers! That is to make sure all the emails and …

store manager is doing a study on how to staff his franchise. He knows that the average number of pizzas ordered is 12 per hour with a standard deviation of 1.4 pizzas. Staffed with 3 employees, he can assemble up to 15 pizzas per …
5. ### Math

The table shows the total number of emails that the Wright family received this morning Member Mr.Wright Mrs.Wright Cole Trinity Emails 7 8 3 3 Mr.Wright=7 emails Mrs.Wright=8 emails Cole=3 emails Trinity=3 emails If the family receives …
6. ### Math

The table shows the total number of emails that the Wright family received this morning Member Mr.Wright Mrs.Wright Cole Trinity Emails 7 8 3 3 Mr.Wright=7 emails Mrs.Wright=8 emails Cole=3 emails Trinity=3 emails If the family receives …
7. ### math

The table shows the total number of emails that the Wright family received this morning. Mr.Wright 7 emails Mrs.Wright 8 emails Cole 3 emails Trinity 3 emails If the family receives 7 more emails,which is the most reasonable prediction …
8. ### Statistics

A professor receives, on average, 8 emails from students on the day before an online quiz. If the distribution of the calls is Poisson, what is the chance that he received at least 6 and at most 10 emails on such a day?
9. ### statistics

On the average five customers visit a children department store each hour. Using Poisson distribution, calculate the probability of three customers shop at the store.
10. ### statistics

An internal study by the Technology Services department at Lahley Electronics revealed company employees receive an average of two emails per hour. Assume the arrival of these emails is approximated by the Poisson distribution. a. …

More Similar Questions