STATISTICS F/BUSINESS+ECONOMICS-TEXT
13th Edition
ISBN: 9781305881884
Author: Anderson
Publisher: CENGAGE L
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Chapter 3.2, Problem 28E
The Australian Open is the first of the four grand Slam professional tennis
- a. Compute the mean, variance, and standard deviation for the serve speeds.
- b. A similar sample of the 20 Women’s Singles serve speed leaders for the 2011 Wimbledon tournament showed a sample mean serve speed of 182.5 kilometers per hour. The variance and standard deviation were 33.3 and 5.77, respectively. Discuss any difference between the serve speeds in the Australian Open and the Wimbledon women’s tournaments.
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Questions ra1kw08h_ch38.15m
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Customers experiencing technical difficulty with their Internet cable service may call an 800 number for technical support. It takes the technician between 30 seconds and 11 minutes to resolve the problem. The distribution of this support time follows the uniform distribution.
Required:
a. What are the values for a and b in minutes?
Note: Do not round your intermediate calculations. Round your answers to 1 decimal place.
b-1. What is the mean time to resolve the problem?
b-2. What is the standard deviation of the time?
c. What percent of the problems take more than 5 minutes to resolve?
d. Suppose we wish to find the middle 50% of the problem-solving times. What are the end points of these two times?
Chapter 3 Solutions
STATISTICS F/BUSINESS+ECONOMICS-TEXT
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. Period Rate of Return...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 - The average number of minutes Americans commute to...Ch. 3.1 - The Wall Street Journal reported that the median...Ch. 3.1 - Which companies spend the most money on...Ch. 3.1 - Over a nine-month period, OutdoorGearLab tested...
Ch. 3.1 - According to the National Education Association...Ch. 3.1 - The Big Bang Theory, a situation comedy featuring...Ch. 3.1 - In automobile mileage and gasoline-consumption...Ch. 3.1 - The data contained in the file named StateUnemp...Ch. 3.1 - Martinez Auto Supplies has retail stores located...Ch. 3.1 - The grade point average for college students is...Ch. 3.1 - The following table shows the total return and the...Ch. 3.1 - Based on a survey of masters programs in business...Ch. 3.1 - Annual revenue for Corning Supplies grew by 5.5%...Ch. 3.1 - Suppose that at the beginning of 2004 you invested...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 - Data collected by the Oil Price information...Ch. 3.2 - The results of a search to find the least...Ch. 3.2 - The Australian Open is the first of the four grand...Ch. 3.2 - The Los Angeles times regularly reports the air...Ch. 3.2 - The following data were used to construct the...Ch. 3.2 - The results of Accounting Principals latest...Ch. 3.2 - Advertising age annually compiles a list of the...Ch. 3.2 - Scores turned in by an amateur golfer at the...Ch. 3.2 - The following times were recorded by the...Ch. 3.3 - Consider a sample with data values of 10, 20, 12,...Ch. 3.3 - Consider a sample with a mean of 500 and a...Ch. 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 - The energy information Administration reported...Ch. 3.3 - The Graduate Management Admission Test (GMAT) is a...Ch. 3.3 - Many families in California are using backyard...Ch. 3.3 - According to a Los Angeles Times study of more...Ch. 3.3 - A sample of 10 NCAA college basketball game scores...Ch. 3.3 - The Wall Street Journal reported that Walmart...Ch. 3.4 - Consider a sample with data values of 27, 25, 20,...Ch. 3.4 - Prob. 47ECh. 3.4 - Prob. 48ECh. 3.4 - A data set has a first quartile of 42 and a third...Ch. 3.4 - Naples, Florida, hosts a half-marathon (13.1-mile...Ch. 3.4 - Annual sales, in millions of dollars, for 21...Ch. 3.4 - Consumer Reports provided overall customer...Ch. 3.4 - Fortune magazines list of the worlds most admired...Ch. 3.4 - The Bureau of Transportation Statistics keeps...Ch. 3.5 - Five observations taken for two variables follow....Ch. 3.5 - Five observations taken for two variables follow....Ch. 3.5 - Ten major college football bowl games were played...Ch. 3.5 - A department of transportations study on driving...Ch. 3.5 - Over the past 40 years, the percentage of homes in...Ch. 3.5 - The Russell 1000 is a stock market index...Ch. 3.5 - A random sample of 30 colleges from Kiplingers...Ch. 3 - The average number of times Americans dine out in...Ch. 3 - USA Today reports that NCAA colleges and...Ch. 3 - The average waiting time for a patient at an El...Ch. 3 - U.S. companies lose 63.2 billion per year from...Ch. 3 - A study of smartphone users shows that 68% of...Ch. 3 - Public transportation and the automobile are two...Ch. 3 - In 2007 the New York Times reported that the...Ch. 3 - The data contained in the DATAfile named...Ch. 3 - Travel + Leisure magazine provides an annual list...Ch. 3 - The 32 teams in the National Football League (NFL)...Ch. 3 - Does a major league baseball teams record during...Ch. 3 - The days to maturity for a sample of five money...Ch. 3 - Automobiles traveling on a road with a posted...Ch. 3 - The Panama Railroad Company was established in...Ch. 3 - Pelican Stores Pelican Stores, a division of...Ch. 3 - Motion Picture Industry The motion picture...Ch. 3 - Business Schools of Asia-Pacific The pursuit of a...Ch. 3 - African Elephant Populations Although millions of...
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