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

Calculate s.d, Less than 5 yrs 22 5-10 18 10-20 5 20-30 4 More than 30 1

Less than 5 yrs 22 5-10 18 10-20 5 20-30 4 More than 30 1

Define ACCOUNTING PERIOD , Any time period specific for which economical re...

Any time period specific for which economical reports are prepared. Talk about FISCAL PERIOD.

Probability combination, From 5 engineering , 6 education .and 8 accountanc...

From 5 engineering , 6 education .and 8 accountancy students, a 5 member committee is to be formed .if at least 1 from each course is in the committee.

Describe the statistical results, Q1. A software developer is interested in...

Q1. A software developer is interested in finding what the best color theme should be for an engine diagnostic program for the flight line. He is considering three different color

Earliest due date, Q1.(i)   A manufacturing firm has previously sequenced i...

Q1.(i)   A manufacturing firm has previously sequenced its jobs using the "Shortest Operation Time" (SOT) rule.  This has resulted in poor delivery performance with many jobs being

Why are jupiter’s galilean moons geologically active, Why are Jupiter’s Gal...

Why are Jupiter’s Galilean moons geologically active? - Io is the most Volcanically active world in our solar system, Io get the heat from a process that happens on its interior

Define Betterment, Define Betterment An inclusion created to, or modify cr...

Define Betterment An inclusion created to, or modify created in, an investment resource, other than servicing, that is estimated to improve its predicted useful life or to improve

Derive an expression for the autocorrelation, i)A sionusodial signal has t...

i)A sionusodial signal has the form x(t) = Asin?t Derive an expression for the autocorrelation Rxx(λ) II) Explain the significance of this result in term of the frequen

Accounting and finance for managers , From the following cost, production...

From the following cost, production and sales data of Decors Motor Ltd., prepare comparative income statement for three years under (i) absorption costing method, and (ii) marginal

Correlation matrix, A. Complete the correlation matrix table. B. Which vari...

A. Complete the correlation matrix table. B. Which variable (s) has the highest correlation coeffieient which is not a perfect correlation? C. Which variable (s) has the lowest cor

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