1. A search engine site claims that, on average, one out of five visitors clicks on an ad.
(a) If 8 users visit the site, what is the probability that at least three click on an ad?
(b) If 8 users visit the site, what is the probability that less than two of them click on an ad?
(c) If 800 users visit the site, would the probability that less than 200 click on an ad be higher or lower than the answer found in part (b)? Write a few sentences explaining your answer- computations are not required (or desired)
(d) Suppose 90 users visit the site during a particular minute, use the normal approximation to estimate the probability that more than 25 of them click on an ad.
(e) If 900 users visited the site, would the probability that more than 250 of them click on an ad be higher or lower than the answer found in part (d)? Write a few sentences explaining your answer- computations are not required (or desired)

2. Suppose that, overall, 5% of all tax returns are audited by the IRS.
(a) If an accountant has 7 clients for whom she prepared tax returns, what is the probability that less than 3 will be audited?
(b) If the accountant has 30 clients, what is the probability that at least one is audited?
(c) Suppose the accountant prepares 500 returns, use the normal approximation to estimate the probability that more than 20 of the returns are audited.

Posted Date: 3/31/2013 12:44:05 PM | Location :

Ask an Expert

Related Discussions:- statistics, Assignment Help, Ask Question on statistics, Get Answer, Expert's Help, statistics Discussions

Write discussion on statistics
Your posts are moderated

Write your message here..

Related Questions

Discovery of Neutron, Discovery of Neutron A neutron is a neutral particle... Discovery of Neutron A neutron is a neutral particle carrying no charge, and having mass equal roughly to the mass of a proton. This particle was discovered experimentally by Chad

What is Accrued expenditures or expenses, Costs or expenses that connect wi... Costs or expenses that connect with the appropriate identification requirements of the finance type engaged but have not been compensated. Acquired expenses are required to be comp

Define wages, Define Wages Income is often associated with production wo... Define Wages Income is often associated with production workers (sometimes referred to as "blue-collar" workers), non-managers, and other workers whose pay is reliant on time wo

Econometrics , Use the data in the BWGHT.txt for this question. The variabl... Use the data in the BWGHT.txt for this question. The variable descriptions are given in the file BWGHT_variables.txt. There are 1388 observations in this dataset. (a) Run the regre

Ti?n luong là gì, # Câu h?i .. # Câu h?i ..

6.2, comulativefrequencydistribution comulativefrequencydistribution

SAS, do this do this

Capital outlays, Capital outlays A budgetary, financial reporting term to ... Capital outlays A budgetary, financial reporting term to end out the expenditures for the acquisition of: addition to:, chief repair of capital assets intended to advantage prospe

AMOUNT AVAILABLE IN DEBT SERVICE FUNDS , AMOUNT AVAILABLE IN DEBT SERVICE ... AMOUNT AVAILABLE IN DEBT SERVICE FUNDS An "other debit" common journal value used in the General Long-Term Bills Additional Consideration that designates the quality of resources

Cash flow statement, how to draw cash flow statement how to draw cash flow statement