Essentials Of Statistics For Business & Economics
9th Edition
ISBN: 9780357045435
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: South-Western College Pub
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Textbook Question
Chapter 3.2, Problem 31E
Cellular Phone Spending. According to the 2016 Consumer Expenditure Survey, Americans spend an average of $1124 on cellular phone service annually (U.S. Bureau of Labor Statistics website). Suppose that we wish to determine if there are differences in cellular phone expenditures by age group. Therefore, samples of 10 consumers were selected for three age groups (18–34, 35–44, 45 and older). The annual expenditure for each person in the sample is provided in the table below.
- a. Compute the
mean , variance, and standard deviation for the each of these three samples. - b. What observations can be made based on these data?
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Who is the better student, relative to his or her classmates? Here’s all the information you ever wanted to know
3. A bag of Skittles contains five colors: red, orange, green, yellow, and purple. The
probabilities of choosing each color are shown in the chart below. What is the probability
of choosing first a red, then a purple, and then a green Skittle, replacing the candies in
between picks?
Color
Probability
Red
0.2299
Green
0.1908
Orange
0.2168
Yellow
0.1889
Purple
0.1736
Name:
Quiz A 5.3-5.4
Sex
Female
Male
Total
Happy
90
46
136
Healthy
20
13
33
Rich
10
31
41
Famous
0
8
8
Total
120
98
218
Use the following scenario for questions 1 & 2.
One question on the Census at School survey
asks students if they would prefer to be happy,
healthy, rich, or famous. Students may only
choose one of these responses. The two-way
table summarizes the responses of 218 high
school students from the United States by
sex.
Preferred
status
1. Define event F as a female student and event R as rich.
a. Find
b. Find or
c. Find and
2. Define event F as a female student and event R as rich.
a. Find
b. Find
c. Using your results from a and b, are these events (female student and rich)
independent?
Use the following scenario for questions 3 & 4.
At the end of a 5k race, runners are
offered a donut or a banana. The
event planner examined each
runner's race bib and noted whether
Age
Less than 30 years old
At least 30 years old
Total
Choice
Donut
Banana
52
54
106
5
72
77
Total
57
126…
Chapter 3 Solutions
Essentials Of Statistics For Business & Economics
Ch. 3.1 - Consider a sample with data values of 10, 20, 12,...Ch. 3.1 - Consider a sample with data values of 10, 20, 21,...Ch. 3.1 - Consider the following data and corresponding...Ch. 3.1 - Consider the following data.
What is the mean...Ch. 3.1 - Consider a sample with data values of 27, 25, 20,...Ch. 3.1 - Consider a sample with data values of 53, 55, 70,...Ch. 3.1 - eICU Waiting Times. There is a severe shortage of...Ch. 3.1 - Middle-Level Manager Salaries. Suppose that an...Ch. 3.1 - Advertising Spending. Which companies spend the...Ch. 3.1 - Advertising Spending. Which companies spend the...
Ch. 3.1 - Time Spent Watching Traditional TV. Nielsen tracks...Ch. 3.1 - Online Multiplayer Game Downloads. The creator of...Ch. 3.1 - Automobile Fuel Efficiencies. In automobile...Ch. 3.1 - Unemployment Rates by State. The U.S. Bureau of...Ch. 3.1 - Motor Oil Prices. Martinez Auto Supplies has...Ch. 3.1 - Calculating Grade Point Averages. The grade point...Ch. 3.1 - The following table shows the total return and the...Ch. 3.1 - Business School Ranking. Based on a survey of...Ch. 3.1 - Revenue Growth Rate. Annual revenue for Corning...Ch. 3.1 - Mutual Fund Comparison. Suppose that at the...Ch. 3.1 - If an asset declines in value from $5000 to $3500...Ch. 3.1 - The current value of a company is 25 million. If...Ch. 3.2 - Consider a sample with data values of 10, 20, 12,...Ch. 3.2 - Consider a sample with data values of 10, 20, 12,...Ch. 3.2 - Consider a sample with data values of 27, 25, 20,...Ch. 3.2 - Price of Unleaded Gasoline. Data collected by the...Ch. 3.2 - Round-Trip Flight Prices. The following table...Ch. 3.2 - Annual Sales Amounts. Varatta Enterprises sells...Ch. 3.2 - Air Quality Index. The Los Angeles Times regularly...Ch. 3.2 - Prob. 30ECh. 3.2 - Cellular Phone Spending. According to the 2016...Ch. 3.2 - Advertising Spend by Companies. Advertising Age...Ch. 3.2 - Amateur Golfer Scores. Scores turned in by an...Ch. 3.2 - Consistency of Running Times. The following times...Ch. 3.3 - Consider a sample with data values of 10, 20, 12,...Ch. 3.3 - Prob. 36ECh. 3.3 - Consider a sample with a mean of 30 and a standard...Ch. 3.3 - Suppose the data have a bell-shaped distribution...Ch. 3.3 - The results of a national survey showed that on...Ch. 3.3 - Price per Gallon of Gasoline. Suppose that the...Ch. 3.3 - GMAT Exam Scores. The Graduate Management...Ch. 3.3 - Many families in California are using backyard...Ch. 3.3 - Best Places to Live. Each year Money magazine...Ch. 3.3 - NCAA Basketball Game Scores. A sample of 10 NCAA...Ch. 3.3 - Prob. 45ECh. 3.4 - Consider a sample with data values of 27, 25, 20,...Ch. 3.4 - Show the boxplot for the data in exercise 46. 46....Ch. 3.4 - Prob. 48ECh. 3.4 - Prob. 49ECh. 3.4 - Naples Half-Marathon Times. Naples, Florida, hosts...Ch. 3.4 - Pharmaceutical Company Sales. Annual sales, in...Ch. 3.4 - Cell Phone Companies Customer Satisfaction....Ch. 3.4 - Most Admired Companies. Fortune magazines list of...Ch. 3.4 - U.S. Border Crossings. The Bureau of...Ch. 3.5 - Five observations taken for two variables follow....Ch. 3.5 - Five observations taken for two variables follow....Ch. 3.5 - Stock Price Comparison. The file StockComparison...Ch. 3.5 - Driving Speed and Fuel Efficiency. A department of...Ch. 3.5 - Smoke Detector Use and Death Rates. Over the past...Ch. 3.5 - Stock Market Indexes Comparison. The Russell 1000...Ch. 3.5 - Best Private Colleges. A random sample of 30...Ch. 3 - Americans Dining Out. Americans tend to dine out...Ch. 3 - NCAA Football Coaches Salaries. A 2017 USA Today...Ch. 3 - Physician Office Waiting Times. The average...Ch. 3 - Worker Productivity and Insomnia. U.S. companies...Ch. 3 - Work Commuting Methods. Public transportation and...Ch. 3 - Household Incomes. The following data represent a...Ch. 3 - Prob. 69SECh. 3 - Best Hotels. Travel + Leisure magazine provides an...Ch. 3 - NFL Teams Worth. In 2014, the 32 teams in the...Ch. 3 - MLB Team Winning Percentages. Does a major league...Ch. 3 - Money Market Funds Days to Maturity. The days to...Ch. 3 - Automobile Speeds. Automobiles traveling on a road...Ch. 3 - Annual Returns for Panama Railroad Company Stock....Ch. 3 - Pelican Stores, a division of National Clothing,...Ch. 3 - Prob. 2CPCh. 3 - The pursuit of a higher education degree in...Ch. 3 - Although millions of elephants once roamed across...
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