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

Assignment., Introduce the aim of this section of the report including an e...

Introduce the aim of this section of the report including an explanation of the data to be analysed. • Use Excel to produce a box and whisker plot for the two sets of booking data

Biostatistics, I need the following exercises done by March 19th at 11:59pm...

I need the following exercises done by March 19th at 11:59pm: 4.4, 4.6, 4.8, 4.10, 4.14, 4.18, 4.26, 4.28. On pages 198-205

Calculating a confidence interval for the proportion, To study what fractio...

To study what fraction of houses for sale in Victoria has a finished basement, a researcher selected a random sample of 20 houses that were on the market. It was found that 11 of t

Assignment, An experiment succeeds twice as often as it fails. Find the cha...

An experiment succeeds twice as often as it fails. Find the chance that in the next six trials there will be at least four successes

Decision-making, 'Statistics is the backbone of decision-making'. Comment.

'Statistics is the backbone of decision-making'. Comment.

Probable, how do you interpret the correlation on the basis of probable err...

how do you interpret the correlation on the basis of probable error

Determine the variance, A gambling machines works in the following way. The...

A gambling machines works in the following way. The player inserts a penny into 1 of 5 slots which are colored Blue, Red, Orange, Yellow & Green corresponding to 5 colored light bu

Normal distribution, Lifts usually have signs indicating their maximum capa...

Lifts usually have signs indicating their maximum capacity. Consider a sign in a lift that reads “maximum capacity 1400kg or 20 persons”. Suppose that the weights of lift-users are

What is a basis point?, What is a basis point? A base factor is a hundre...

What is a basis point? A base factor is a hundredth (1/100) of an amount factor. Indicated another way, one amount factor is equal to 100 base factors. This means that if an amo

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