# Using Poisson, find the number of hits a server gets...

**Question description**

A web server receives an average of 11 hits per day. Implying a Poisson process --

1) Find P(time until next hit is > 3 hrs)

2) Find mean & variance for time until 200th hits (notice we are looking at the sum of 200 exponential random variables)

3) Use normal distribution to estimate the probability that the 200th hit occurs after more than 20 days.

## Tutor Answer

## Review from our student for this Answer

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors