   # Market-share-analysis company Net Applications monitors and reports on Internet browser usage. According to Net Applications, in the summer of 2014, Google’s Chrome browser exceeded a 20% market share for the first time, with a 20.37% share of the browser market ( Forbes website, December 15, 2014). For a randomly selected group of 20 Internet browser users, answer the following questions. a. Compute the probability that exactly 8 of the 20 Internet browser users use Chrome as their Internet browser. b. Compute the probability that at least 3 of the 20 Internet browser users use Chrome as their Internet browser. c. For the sample of 20 Internet browser users, compute the expected number of Chrome users. d. For the sample of 20 Internet browser users, compute the variance and standard deviation for the number of Chrome users. 13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884

#### Solutions

Chapter
Section 13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884
Chapter 5.5, Problem 39E
Textbook Problem
6407 views

## Market-share-analysis company Net Applications monitors and reports on Internet browser usage. According to Net Applications, in the summer of 2014, Google’s Chrome browser exceeded a 20% market share for the first time, with a 20.37% share of the browser market (Forbes website, December 15, 2014). For a randomly selected group of 20 Internet browser users, answer the following questions. a. Compute the probability that exactly 8 of the 20 Internet browser users use Chrome as their Internet browser. b. Compute the probability that at least 3 of the 20 Internet browser users use Chrome as their Internet browser. c. For the sample of 20 Internet browser users, compute the expected number of Chrome users. d. For the sample of 20 Internet browser users, compute the variance and standard deviation for the number of Chrome users.

a.

To determine

Find the probability that exactly 8 of the 20 Internet browser users use chrome as their internet browser.

### Explanation of Solution

Calculation:

A random sample of 20 Internet browser users is selected. The percentage share of the browser market is 20.37% for google chrome.

Define the random variable x as the number of internet browsers who use google chrome. Here, a random sample (n) of 20 Internet browser users is selected is taken. Each Internet browser user is independent of the other. Also, there are two possible outcomes, the Internet browser user uses google chrome or not (success or failure). It was found that 20.37% of the Internet browser users use google chrome. Thus, the probability of success (p) is 0.2037. Thus, x follows binomial distribution.

The probability of obtaining x successes in n independent trails of a binomial experiment is,

f(x)=(nx)px(1p)nx,x=0,1,2,...,n

Where, p is the probability of success.

Substitute values n=20 and p=0.2037 in the above equation. Then,

f(x)=(20x)(0

b.

To determine

Find the probability that at least 3 of the 20 Internet browser users use chrome as their internet browser.

c.

To determine

Compute the expected number of chrome users.

d.

To determine

Compute the variance and standard deviation for the number of chrome users.

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts
What is inflation and what causes it?

Principles of Microeconomics (MindTap Course List)

What is the conceptual framework of accounting?

Cornerstones of Financial Accounting

What methods are used?

Foundations of Business (MindTap Course List)

Why is productivity important?

Essentials of Economics (MindTap Course List)

Is an initial public offering an example of a primary or a secondary market transaction? Explain.

Fundamentals of Financial Management, Concise Edition (with Thomson ONE - Business School Edition, 1 term (6 months) Printed Access Card) (MindTap Course List)

Explain why blinding is a reasonable strategy in many experiments.

Introduction To Statistics And Data Analysis

In Exercises 7-28, perform the indicated operations and simplify each expression. 27. 100[(t2+20t+100)(2t+10)(t...

Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach

Which of the following is not a hypothesis of Rolles Theorem? a) f is continuous on [a, b]. b) f(a) = f(b). c) ...

Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th

The curve given by r(t) = 2i + tj + 2tk is a: line plane spiral circle

Study Guide for Stewart's Multivariable Calculus, 8th

Solve each equation: 102x=42

Elementary Technical Mathematics

Evaluate the integral, if it exists. sinh(1+4x)dx

Single Variable Calculus: Early Transcendentals

Find f in terms of g. f(x) = g(x2)

Single Variable Calculus: Early Transcendentals, Volume I

Write the following numbers in word form. 34.581

Contemporary Mathematics for Business & Consumers

Evaluating Formulas In Exercises S-21 through S-30, you are given a formula that you are asked to evaluate with...

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)

17. A manager of a large corporation recommends a \$10,000 raise be given to keep a valued subordinate from movi...

Modern Business Statistics with Microsoft Office Excel (with XLSTAT Education Edition Printed Access Card) (MindTap Course List)

Construct a mathematical model for a radioactive series of four elements W, X, Y, and Z, where Z is a stable el...

A First Course in Differential Equations with Modeling Applications (MindTap Course List) 