The National Weather Service issues precipitation forecasts thatindicate. Thelikelihood of measurable precipitation (Ú .01 inch) at a specific point(the official rain gauge) during agiven time period. Suppose that if a measurable amountof rain falls during the next 24 hours, a river will reachthe flood stage, and a business will incur damages of $300,000. The National Weather Service has indicated that there isa 30% chance of a measurable amount of rain during thenext 24 hours.

a.Construct the probability distribution that describes thepotential flood damages.

b.Find the firm’s expected loss due to flood damage.

Short Answer

Expert verified

a. There are potential flood damages following Bernoulli distribution.

b. The expected loss due to damage$2700000 .

Step by step solution

01

Given information

The likelihood of measurable precipitation is0.01 inches. The business will incur damages of 300000. The weather service would be indicated that there is a 30%chance of a measurable amount of rain.

02

(a) Construct the probability distribution

Constructing the distribution that describes the potential flood damages is:

This flood damage follows Bernoulli distribution. Because there are two possible casesof rain and not rain, in this case, the distribution will follow the Bernoulli distribution.

We must determine the probability distribution of possible rain damage.

Let x represent the flood damage.

Given that if a flood occurs, the firm will suffer a $300,000 loss.

If the flood does not occur, the firm is not harmed.

National weather agencies predicted a 30% probability of rain.

The probability distribution of X is thus

03

(b) Find the expected loss due to flood damage

The expected loss is given by

3000000×30100=90,000

So, there are expected loss of $90,000

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Soft-drink dispenser. The manager of a local soft-drink bottling company believes that when a new beverage dispensing machine is set to dispense 7 ounces, it in fact dispenses an amount at random anywhere between 6.5and 7.5 ounces inclusive. Suppose has a uniform probability

distribution.

a.Is the amount dispensed by the beverage machine a discreteor a continuous random variable? Explain.

b. Graph the frequency function forX , the amount of beverage the manager believes is dispensed by the new machine when it is set to dispense 7 ounces.

c. Find the mean and standard deviation for the distribution graphed in part b, and locate the mean and theinterval μ±2σon the graph.

d. Find P(x7).

e. FindP(x<6) .

f. FindP(6.5x7.25) .

g. What is the probability that each of the next six bottles filled by the new machine will contain more than7.25 ounces of beverage? Assume that the amount of beverage dispensed in one bottle is independent of the amount dispensed in another bottle.

Mailrooms contaminated with anthrax. During autumn 2001, there was a highly publicized outbreak of anthrax cases among U.S. Postal Service workers. In Chance (Spring 2002), research statisticians discussed the problem of sampling mailrooms for the presence of anthrax spores. Let x equal the number of mailrooms contaminated with anthrax spores in a random sample of n mailrooms selected from a population of N mailrooms. The researchers showed that the probability distribution for x is given by the formula P(x)=(kx)(N-kn-x)(Nn)

where k is the number of contaminated mailrooms in the population. (In Section 4.4 we identify this probability distribution as the hypergeometric distribution.) Suppose N = 100, n = 3, and k = 20.

a. Find p(0).

b. Find p(1)

. c. Find p(2).

d. Find p(3)

Assume that xhas an exponential distribution withθ=3.

Find

a.P(x1)

b.P(x>1)

c.P(x=1)

d.P(x6)

e.P(2x10)

Hotel guest satisfaction. Refer to the 2015 North American Hotel Guest Satisfaction Index Study, Exercise 4.49 (p. 239). You determined that the probability that a hotel guest was delighted with his or her stay and would recommend the hotel is .12. Suppose a large hotel chain randomly samples 200 of its guests. The chain’s national director claims that more than 50 of these guests were delighted with their stay and would recommend the hotel.

a. Under what scenario is the claim likely to be false?

b. Under what scenario is the claim likely to be true?

185 Software file updates. Software configuration management was used to monitor a software engineering team’s performance at Motorola, Inc. (Software Quality Professional, Nov. 2004). One of the variables of interest was the number of updates to a file that was changed because of a problem report. Summary statistics forn=421 n = 421 files yielded the following results: role="math" localid="1658219642985" x¯=4.71,s=6.09, QL=1, andQU=6 . Are these data approximately normally distributed? Explain.

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free