Math

StatisticsSTATISTICS F/BUSINESS+ECONOMICS-TEXTThe Bank of America trends in Consumer Mobility Report indicates that in a typical day, 51% of users of mobile phones use their phone at least once per hour, 26% use their phone a few times per day, 8% use their phone morning and evening, and 13% hardly ever use their phones. The remaining 2% indicated that they did not know how often they used their mobile phone ( USA today, July 7, 2014). Consider a sample of 150 mobile phone users. a. What is the probability that at least 70 use their phone at least once per hour? b. What is the probability that at least 75 but less than 80 use their phone at least once per hour? c. What is the probability that less than 5 of the 150 phone users do not know how often they use their phone?BuyFind*arrow_forward*

13th Edition

Anderson

Publisher: CENGAGE L

ISBN: 9781305881884

Chapter 6.3, Problem 31E

Textbook Problem

1504 views

The *Bank of America trends in Consumer Mobility Report* indicates that in a typical day, 51% of users of mobile phones use their phone at least once per hour, 26% use their phone a few times per day, 8% use their phone morning and evening, and 13% hardly ever use their phones. The remaining 2% indicated that they did not know how often they used their mobile phone (*USA today,* July 7, 2014). Consider a sample of 150 mobile phone users.

- a. What is the probability that at least 70 use their phone at least once per hour?
- b. What is the probability that at least 75 but less than 80 use their phone at least once per hour?
- c. What is the probability that less than 5 of the 150 phone users do not know how often they use their phone?

Expert Solution

**a.**

To determine

Find the probability that at least 70 use phone at least once per hour.

**Calculation:**

In report of bank of America trends in consumer mobility, the 51% of mobile users use their phone at least once per hour, 26% use their phone a few times a day, 8% use their phone morning and evening in a day and 13% use hardly ever their phones. The 2% users did not know how often they use their phone.

The formula for mean in binomial distribution is,

The value of mean is,

The formula for standard deviation is,

The value of standard deviation is,

*Continuity correction:*

The binomial probability is converted to a normal probability by using the continuity correction.

If the binomial probability represents “fewer than *c*” then the normal probability is

Expert Solution

**b.**

To determine

Find the probability of at least 75 but less than 80 users are in the category at least once per hour.

Expert Solution

**c.**

To determine

Find the probability of less than 5 users do not know how often they use their phone.

STATISTICS F/BUSINESS+ECONOMICS-TEXT

Show all chapter solutions

Ch. 6.1 - The random variable x is known to be uniformly...Ch. 6.1 - The random variable x is known to be uniformly...Ch. 6.1 - Delta Airlines quotes a flight time of 2 hours, 5...Ch. 6.1 - Most computer languages include a function that...Ch. 6.1 - In October 2012, Apple introduced a much smaller...Ch. 6.1 - A Gallup Daily Tracking Survey found that the mean...Ch. 6.1 - Suppose we are interested in bidding on a piece of...Ch. 6.2 - Using Figure 6.4 as a guide, sketch a normal curve...Ch. 6.2 - A random variable is normally distributed with a...Ch. 6.2 - Draw a graph for the standard normal distribution....

Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - Given that z is a standard normal random variable,...Ch. 6.2 - The mean cost of domestic airfares in the United...Ch. 6.2 - The average return for large-cap domestic stock...Ch. 6.2 - Automobile repair costs continue to rise with the...Ch. 6.2 - The average price for a gallon of gasoline in the...Ch. 6.2 - A person must score in the upper 2% of the...Ch. 6.2 - Television viewing reached a new high when the...Ch. 6.2 - The time needed to complete a final examination in...Ch. 6.2 - The American Automobile Association (AAA) reported...Ch. 6.2 - New York City is the most expensive city in the...Ch. 6.3 - A binomial probability distribution has p = .20...Ch. 6.3 - Assume a binomial probability distribution has p =...Ch. 6.3 - Although studies continue to show smoking leads to...Ch. 6.3 - A CBS News/New York Times survey found that 97% of...Ch. 6.3 - Playing video and computer games is very popular....Ch. 6.3 - The Bank of America trends in Consumer Mobility...Ch. 6.4 - Consider the following exponential probability...Ch. 6.4 - Consider the following exponential probability...Ch. 6.4 - Battery life between charges for the Motorola...Ch. 6.4 - The time between arrivals of vehicles at a...Ch. 6.4 - Comcast Corporation is the largest cable...Ch. 6.4 - Wendys restaurant has been recognized for having...Ch. 6.4 - The Boston Fire Department receives 911 calls at a...Ch. 6 - A business executive, transferred from Chicago to...Ch. 6 - The NCAA estimates that the yearly value of a full...Ch. 6 - Motorola used the normal distribution to determine...Ch. 6 - During early 2012, economic hardship was...Ch. 6 - The port of South Louisiana, located along 54...Ch. 6 - Ward Doering Auto Sales is considering offering a...Ch. 6 - The XO Group Inc. conducted a survey of 13,000...Ch. 6 - Assume that the test scores from a college...Ch. 6 - According to the National Association of Colleges...Ch. 6 - A machine fills containers with a particular...Ch. 6 - Consider a multiple-choice examination with 50...Ch. 6 - A blackjack player at a Las Vegas casino learned...Ch. 6 - The Information Systems Audit and Control...Ch. 6 - The website for the Bed and Breakfast Inns of...Ch. 6 - Do you dislike waiting in line? Supermarket chain...Ch. 6 - The time (in minutes) between telephone calls at...

Find more solutions based on key concepts

Show solutions Exercise 34 presented the following data on endotoxin concentration in settled dust both for a sample of urban ...

Probability and Statistics for Engineering and the Sciences

England and Scotland both produce scones and sweaters. Suppose that an English worker can produce 50 scones per...

Principles of Macroeconomics (MindTap Course List)

You win 100 in a basketball pool. You have a choice between spending the money now and putting it away for a ye...

Principles of Economics (MindTap Course List)

What are demand deposits and why should they be included in the stock of money?

Brief Principles of Macroeconomics (MindTap Course List)

(The Long-Run Industry Supply Curve) The following graph shows possible long-run market supply curves for a per...

ECON: MICRO4 (New, Engaging Titles from 4LTR Press)

American and Japanese workers can each produce 4 cars a year. An American worker can produce 10 tons of grain a...

Principles of Microeconomics (MindTap Course List)

Describe the differences between the current, quick, and cash ratios. Which one is the most conservative measur...

Cornerstones of Financial Accounting

Income statement FedEx Corporation had the following revenue and expense account balances (in millions) for a r...

Financial & Managerial Accounting

Discuss the similarities and differences between the discounted dividend and corporate valuation models.

Fundamentals Of Financial Management, Concise Edition (mindtap Course List)

When the Bell System was broken up, the old ATT was split into a new ATT and seven regional telephone companies...

Fundamentals of Financial Management (MindTap Course List)

How does Internet EDI differ from traditional EDI in process? In result?

Accounting Information Systems

Direct Response: Interviewing at Marmont backgrounds. Fortunately, you were able to reschedule all three candi...

Essentials of Business Communication (MindTap Course List)

What are the major elements of design planning?

Foundations of Business (MindTap Course List)

What is the difference between adjusting entries and correcting entries?

Corporate Financial Accounting

INFLATION CROSS-PRODUCT An analyst is evaluating securities in a developing nation where the inflation rate is ...

Fundamentals of Financial Management, Concise Edition (MindTap Course List)

Using the work sheet provided in Checkpoint Exercise 1, prepare closing entries in general journal form.

College Accounting, Chapters 1-27

Ethics in Action Danielle Hastings was recently hired as a cost analyst by CareNet Medical Supplies Inc. One of...

Financial And Managerial Accounting

LivingSocial started with one "daily deal," a $25 voucher for $50 worth of food at a Washington, D.C., area res...

Management, Loose-Leaf Version

Using the income statement for Adventure Travel Service shown in Practice Exercise 1-4A, prepare a statement of...

Financial Accounting

Water is necessary for life. Is the marginal benefit of a glass of water large or small?

Essentials of Economics (MindTap Course List)

Contrast the focus of marketing activities during the five eras of marketing history.

Contemporary Marketing

Explain when marketing research should be conducted

MKTG 12:STUDENT ED.-TEXT

Evaluate the following statement: The balance of payments equals â€”$200 million and the statistical discrepanc...

Exploring Economics

Consider the data set in Table 1.7 a. Compute the average endowment for the sample. b. Compute the average perc...

Statistics for Business & Economics, Revised (MindTap Course List)

This chapter stressed the importance of data normalization when constructing a relational database. Why, then, ...

Accounting Information Systems

Activity-based costing and product cost distortion The management of Four Finger Appliance Company in Exercise ...

Financial & Managerial Accounting

The following selected transactions were completed by Zippy Do Co., a supplier of zippers for clothing:

Financial Accounting

Indicate whether the following instruments are examples of money market or capital market securities. a. U.S. T...

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

Which of the following is the adjusting entry for depreciation on Equipment? Debit Depreciation Expense, Equipm...

College Accounting (Book Only): A Career Approach

How are the three financial statements shown in this chapter connected?

College Accounting (Book Only): A Career Approach

Vertical analysis of income statement The following comparative income statement (in thousands of dollars) for ...

Accounting (Text Only)

In the cost-volume-profit graph, a. the break-even point is found where the total revenue curve crosses the x-a...

Managerial Accounting: The Cornerstone of Business Decision-Making

Researching GAAP Situation Kelly Company, a small corporation, is preparing its 2019 financial statements. At t...

Intermediate Accounting: Reporting And Analysis

Assume that an average firm in the office supply business has a 6% profit margin, a 40% total liabilities / ass...

Fundamentals of Financial Management (MindTap Course List)

Over the past 20 years, Mexico has had high inflation and Japan has had low inflation. What do you predict has ...

Principles of Macroeconomics (MindTap Course List)

What are the distinctive features of ToyJoys income statement? Its statement of retained earnings? Its balance ...

College Accounting, Chapters 1-27 (New in Accounting from Heintz and Parry)

What are the limitations of the centralized database approach to business information systems?

Pkg Acc Infor Systems MS VISIO CD

Identify how changes in L, K, and T can lead to changes in output, or Real GDP.

Economics (MindTap Course List)

The theory of monopolistic competition predicts that in long-run equilibrium, a monopolistically competitive fi...

Economics For Today

Monetary policy can affect relative prices. Do you agree or disagree with this statement? Explain your answer.

Macroeconomics

Managing Supplier Quality: Integrated Devices Bill Edwards is a quality engineer assigned to the Injected Moldi...

Purchasing and Supply Chain Management

Bonds payable transactions I sing the data from P8-3, indicate the effects on net assets and EPS of each of the...

Survey of Accounting (Accounting I)

Income statement FedEx Corporation had the following revenue and expense account balances (in millions) for a r...

Corporate Financial Accounting

Classify each of the following departments in a factory that produces crme-filled snack cakes as a producing de...

Cornerstones of Cost Management (Cornerstones Series)

Among the questions asked on the application for employment form of Horner Company are the following: a. What i...

PAYROLL ACCT.,2019 ED.(LL)-TEXT

Consider again Grand Prixs problem of shipping automobiles from three plants to four regions. However, the prob...

Practical Management Science

A random sample is selected from a normal population with a mean of =30and a standard deviation of =8 . After a...

Statistics for The Behavioral Sciences (MindTap Course List)

Zoo Attendance. The Cincinnati Zoo and Botanical Gardens had a record attendance of 1.87 million visitors in 20...

Essentials Of Statistics For Business & Economics

For Problems 5-14, please provide the following information. (a) What is the level of significance? State the n...

Understanding Basic Statistics

The college offers all students an optional seminar on note taking and study skills. Suppose that a researcher ...

Research Methods for the Behavioral Sciences (MindTap Course List)

The paper Predictors of Complementary Therapy Use Among Asthma Patients: Results of a Primary Care Survey (Heal...

Introduction To Statistics And Data Analysis

Find each or the followin.tt values for the distribution shown in the following polygon. a. n b. X c. X2

Essentials of Statistics for The Behavioral Sciences (MindTap Course List)

Describe how the concept of participant reactivity might explain why a persons behavior in a group of strangers...

Research Methods for the Behavioral Sciences (MindTap Course List)

PA The city manager has received a complaint from the local union of firefighters to the effect that they are u...

Essentials Of Statistics

Solve the equations in Exercises 126. (x2+1)x+1(x+1)3=0

Finite Mathematics and Applied Calculus (MindTap Course List)

Sketching a Graph In Exercises 15-20, sketch the graph of the function. y=2x

Calculus (MindTap Course List)

Represent the decimal integers in 1-6 in binary notation. 287

Discrete Mathematics With Applications

Finding Parallel and Perpendicular Lines In Exercises 57-62, write the general forms of the equations of the li...

Calculus: Early Transcendental Functions (MindTap Course List)

Use a table of Values to estimate i:he value of the limit. If you have a graphing device. use it to confirm you...

Single Variable Calculus: Early Transcendentals

For each expression below, write an equivalent algebraic expression that involves x only. (For Problems 89 thro...

Trigonometry (MindTap Course List)

Suppose that over a certain region of space the electrical potential V is given by V(x, y, z) = 5x2 3xy + xyz....

Multivariable Calculus

a Write the definition of the triple integral of f over a rectangular box B. b How do you evaluate Bf(x,y,z)dV?...

Calculus (MindTap Course List)

Sketch the direction field of the differential equation. Then use it to sketch a solution curve that passes thr...

Single Variable Calculus

ZERO COUPON BONDS Nina purchased a zero coupon bond for 6724.53. The bond matures in 7years and has a face valu...

Finite Mathematics for the Managerial, Life, and Social Sciences

Determining Differentiability In Exercises 77-80, describe the x -values at which f is differentiable. f(x)=x+1...

Calculus of a Single Variable

Compound Interest $10.000 is deposited for 2 years in an account that earns 5% interest. a. Calculate the simpl...

Mathematical Excursions (MindTap Course List)

Label each of the following statements as either true or false. If z=a+bi is a zero of a polynomial f(x) with c...

Elements Of Modern Algebra

Powers Using De Moivres Theorem Find the indicated power using De Moivres Theorem. 73. (1 i)7

Precalculus: Mathematics for Calculus (Standalone Book)

Find the exact volume of the solid that results when the region bounded in quadrant I by the axes and the lines...

Elementary Geometry For College Students, 7e

In Exercises 25-30, find the rules for the composite functions f g and g f. 28. f(x)=2x+3;g(x)=x2+1

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

Evaluate the double integral by first identifying it as the volume of a solid. 11. R(42y)dA,R=[0,1][0,1]

Calculus: Early Transcendentals

The freight charged by a trucking firm for a parcel under 200 pounds depends on the distance it is being shippe...

Intermediate Algebra

Determine the accuracy of each measurement; that is, give the number of significant digits for each measurement...

Elementary Technical Mathematics

Evaluating a Line Integral In exercises 2332, evaluate CF.dr along each path. (Hint: If F is conservative, the ...

Multivariable Calculus

Find the limit. Use lHospitals Rule where appropriate. If there is a more elementary method, consider using it....

Single Variable Calculus: Early Transcendentals, Volume I

The graph of y = f(3x) is obtained from the graph of y = f(x) by:
stretching vertically by a factor of 3.
compr...

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

An iterated integral for the volume of the solid shown is:

Study Guide for Stewart's Multivariable Calculus, 8th

Determining Continuity In Exercises 11-40, describe the interval(s) on which the function is continuous. Explai...

Calculus: An Applied Approach (MindTap Course List)

3. Find the minimum value of subject to the constraint .

Mathematical Applications for the Management, Life, and Social Sciences

In Exercises 9 to 24, find an equation of the line described. Leave the solution in the form Ax+By = C. The lin...

Elementary Geometry for College Students

In Exercises 3148, (a) factor the given expression, and (b) set the expression equal to zero and solve for the ...

Applied Calculus

Solve the following problems and reduce to lowest terms.
13.

Contemporary Mathematics for Business & Consumers

Expand each expression in Exercises 122. (3x+1)2

Finite Mathematics

Systems That May Be Solved by Hand or With Technology The system of equations in Exercises S-7 through S-22may ...

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

Determine how many linear factors and zeros each polynomial function has. P(x)=x364x

College Algebra (MindTap Course List)

Slope Field In Exercises 39 and 40, a differential equation, a point, and a slope field are given, (a) Sketch t...

Calculus: Early Transcendental Functions

Use the Hill-Huntington Method to determine how calculators should be divided among the school in Exercise 9. 9...

Mathematics: A Practical Odyssey

Solve each of the following equations using the addition principle of equality. Check each answer. T12=34

Mathematics For Machine Technology

29. Customers arrive at a movie theater at the advertised movie time only to find that they have to sit through...

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

Use the following information to answer the next five exercises: A po11 of 1.200 voters asked what the most sig...

Introductory Statistics

The following problems consider the historic average cost per gigabyte of RAM on a computer. Year 5-Year Change...

Calculus Volume 2