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

Joy, Ask questio How many women must be randomly selected to estimate the m...

Ask questio How many women must be randomly selected to estimate the mean weight of women in one age group? We want 90% confidence that the sample mean is within 3.7 lbs of the po

Probability and Counting Rules, what is the form of the answers in probabil...

what is the form of the answers in probability? in decimal? in fraction? or what?

Student, Design an activity based cost system requires that: a) the job bid...

Design an activity based cost system requires that: a) the job bid process redesigned b) resource costs be linked to the activities performed c)the cost of activities be linked to

Business law, LAW 2003 Assignment 1 (Winter 2012) 1. Brief the following c...

LAW 2003 Assignment 1 (Winter 2012) 1. Brief the following case: Ragoonanan v. Imperial Tobacco (from pages 587 to 595 of the Ontario Reports) on the document attached online. It’

Tools., what do you mean by correct and remedy the equipment trouble as ins...

what do you mean by correct and remedy the equipment trouble as instructed by the expert.

Calculate bonferroni confidence intervals, The "recoverytime" files record ...

The "recoverytime" files record the time (in days) for male blue-collar workers to recover from a common wrist fracture. Each man was given a questionnaire to complete to determine

Estimate of the population mean time, The average cost per night of a hotel...

The average cost per night of a hotel room in New York City is $273 (SmartMoney, March 2009). Assume this estimate is based on a sample of 45 hotels and that the sample standard

Describe the location of firms and equilibrium , Take the Hotelling's locat...

Take the Hotelling's location model (the linear city) discussed in class for the case in which all firms are required to charge the same fixed price. Further assume that firms choo

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