Probability that the next call will occur after given time

Assignment Help Basic Statistics

Reference no: EM131426765

Psychology and Human Behavior

In Columbia, South Carolina, on a randomly selected Friday night between 9:00 p.m. and 2:00 a.m., the time (in minutes) between calls to a 911 dispatcher has an exponential distribution with l 5 0.125. Suppose a Friday evening in Columbia is selected at random.

a. If a 911 call is taken at 10:07 p.m., what is the probability that the next call will occur before 10:30 p.m.?

b. If a 911 call is taken at 11:30 p.m., what is the probability that the next call will occur after 11:45 p.m.?

c. Find the mean, variance, and standard deviation for the time between 911 calls.

d. Find a value t such that if a 911 call is received between 9:00 p.m. and 2:00 a.m., then the probability that the next 911 call will occur more than t minutes later is 0.75.

Reference no: EM131426765

Questions Cloud

Understanding and analyzing business communication situation : Create a communication strategy that fosters change and innovation. What am I trying to achieve and how will my audience react to what I am trying to achieve and will my message be resisted?

Create a secondary index : CSC 553: Advanced Database Topics Assignment. This will give you a chance to apply everything you learned in the class. We will use two different databases (Postgres and Oracle are easiest because you have access to them already and you even have t..

Calculating the true gdp deflator : 1. Explain how uncertainty in calculating the true GDP deflator makes it uncertain how much the production of goods and services has increased.

What additional services do my target customers want : Who are my Target Customers? How can I best reach them? What additional services do my Target Customers want? What quality of service of product does my customer desire?

Probability that the next call will occur after given time : If a 911 call is taken at 10:07 p.m., what is the probability that the next call will occur before 10:30 p.m.?- If a 911 call is taken at 11:30 p.m., what is the probability that the next call will occur after 11:45 p.m.?

Bang-for-the-buck effect on the economy : 1. Give 2 reasons why increasing government spending could have a stronger bang-for-the-buck effect on the economy than an equivalent-sized tax cut. (2-3 sentences)

How long should you wait before getting another booster shot : Suppose two people independently receive tetanus shots. What is the probability that both shots still have an effect after more than five years?

Why do companies acquire other companies : Why do companies acquire other companies? Describe some of the possible economic justifications for acquiring another company. MINIMUM OF 250 WORDS!

What are the issues surrounding the bankruptcy : Why did the company enter bankruptcy? What happened or is likely to happen? What are the issues surrounding the bankruptcy?

User Account

All Pages