statistics, Basic Statistics

Assignment Help:
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.

Related Discussions:- statistics

Explanation of the statistical analyses, Introduction Background inform...

Introduction Background information so the reader can better grasp the analyses you are going to present. This can include anything that puts the analyses into perspective for

Word problem, Suppose that cars pass a certain toll booth at an average rat...

Suppose that cars pass a certain toll booth at an average rate of 10 cars per minute between the hours of 7 a.m. and 9 a.m. The random variable X counts the number of cars that pas

Treatment of cst and vat, Treatment of CST and VAT in Sales Book A suppl...

Treatment of CST and VAT in Sales Book A supplier who expenses the CST for inter declares purchase by him, is responsible to first deposit the gathered CST from bought to Got Co

perform hypothesis test and find the minimum sample size, Questions ...

Questions In one hybridization experiment 8070 offspring seeds were obtained, and 23.54% of them had green flowers.  The others had white flowers.  Perform a hypothesis test

Free hand in measurig trend, advantages and disadvantages of free hand in m...

advantages and disadvantages of free hand in measurig trend

Find the pv of the depreciation tax, PC Shopping Network may upgrade its mo...

PC Shopping Network may upgrade its modem pool. It last upgraded 2 years ago, when it spent $115 million on equipment with a life of 5 years and a salvage value of $15 million. The

Homework help, example of descriptive statistics in word form

example of descriptive statistics in word form

Index nos, why indux number considerd as an economic barrometer

why indux number considerd as an economic barrometer

Define Nuclear force, Nuclear force Is a short range force extending upto...

Nuclear force Is a short range force extending upto 10 fm. It is fifty-sixty times stronger than electromagnetic force. Nuclear force is independent of charge. Nuclear force betw

Find karl pearson''s correlation coefficient, Find Karl Pearson's correlati...

Find Karl Pearson's correlation coefficient between the sales and expenses from the data given below:

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd