Introductory Statistics1st EditionBarbara Illowsky, Susan Dean Publisher: OpenStax CollegeISBN: 9781938168208
Introductory Statistics
Solutions for Introductory Statistics
Problem 11.1TI:
A factory manager needs to understand how many products are defective versus how many are produced....Problem 11.2TI:
Teachers want to know which night each week their students are doing most of their homework. Most...Problem 11.3TI:
The expected percentage of the number of pets students have in their homes is distributed (this is...Problem 11.4TI:
Students in a social studies class hypothesize that the literacy rates across the world for every...Problem 11.5TI:
A sample of 300 students is taken. Of the students surveyed, 50 were music students, while 250 were...Problem 11.6TI:
The Bureau of Labor Statistics gathers data about employment in the United States. A sample is taken...Problem 11.7TI:
Refer back to the information in Try It. How many service providing jobs are there expected to be in...Problem 11.8TI:
Do families and singles have the same distribution of cars? Use a level of significance of 0.05....Problem 11.9TI:
Ivy League schools receive many applications, but only some can be accepted. At the schools listed...Problem 11.10TI:
A SCUBA instructor wants to record the collective depths each of his students dives during their...Problem 11.11TI:
The FCC conducts broadband speed tests to measure how much data per second passes between a...Problem 1P:
If the number of degrees of freedom for a chi-square distribution is 25, what is the population mean...Problem 2P:
If df > 90, the distribution is _____________. If df = 15, the distribution is ________________.Problem 4P:
Where is µ located on a chi-square curve?Problem 6P:
Determine the appropriate test to be used in the next three exercises. An archeologist is...Problem 7P:
Determine the appropriate test to be used in the next three exercises. An economist is deriving a...Problem 8P:
Determine the appropriate test to be used in the next three exercises. A personal trainer is putting...Problem 9P:
Use the following information to answer the next five exercises: A teacher predicts that the...Problem 10P:
Use the following information to answer the next five exercises: A teacher predicts that the...Problem 11P:
x2test statistic = ______. Use the following information to answer the next five exercises: A...Problem 12P:
Use the following information to answer the next five exercises: A teacher predicts that the...Problem 13P:
Use the following information to answer the next five exercises: A teacher predicts that the...Problem 14P:
Use the following information to answer the next nine exercises: The following data are real. The...Problem 15P:
Use the following information to answer the next nine exercises: The following data are real. The...Problem 16P:
Use the following information to answer the next nine exercises: The following data are real. The...Problem 17P:
Use the following information to answer the next nine exercises: The following data are real. The...Problem 18P:
Use the following information to answer the next nine exercises: The following data are real. The...Problem 19P:
Use the following information to answer the next nine exercises: The following data are real. The...Problem 20P:
Use the following information to answer the next nine exercises: The following data are real. The...Problem 21P:
Use the following information to answer the next nine exercises: The following data are real. The...Problem 22P:
Use the following information to answer the next nine exercises: The following data are real. The...Problem 23P:
Test of Independence Determine the appropriate test to be used in the next three exercises. A...Problem 24P:
Test of Independence Determine the appropriate test to be used in the next three exercises. The...Problem 25P:
Test of Independence Determine the appropriate test to be used in the next three exercises. A...Problem 26P:
Use the following information to answer the next seven exercises: Transit Railroads is interested in...Problem 27P:
Use the following information to answer the next seven exercises: Transit Railroads is interested in...Problem 28P:
Use the following information to answer the next seven exercises: Transit Railroads is interested in...Problem 29P:
Use the following information to answer the next seven exercises: Transit Railroads is interested in...Problem 30P:
Use the following information to answer the next seven exercises: Transit Railroads is interested in...Problem 31P:
Use the following information to answer the next seven exercises: Transit Railroads is interested in...Problem 32P:
Use the following information to answer the next seven exercises: Transit Railroads is interested in...Problem 33P:
Use the following information to answer the next eight exercises: An article in the New England...Problem 34P:
Use the following information to answer the next eight exercises: An article in the New England...Problem 35P:
Use the following information to answer the next eight exercises: An article in the New England...Problem 36P:
Use the following information to answer the next eight exercises: An article in the New England...Problem 37P:
Use the following information to answer the next eight exercises: An article in the New England...Problem 38P:
Use the following information to answer the next eight exercises: An article in the New England...Problem 39P:
Use the following information to answer the next eight exercises: An article in the New England...Problem 40P:
Use the following information to answer the next eight exercises: An article in the New England...Problem 41P:
a = 0.05 a. Decision: ___________________ b. Reason for the decision: ___________________ c....Problem 42P:
a = 0.01 a. Decision: ___________________ b. Reason for the decision: ___________________ c....Problem 43P:
A math teacher wants to see if two of her classes have the same distribution of test scores. What...Problem 45P:
A market researcher wants to see if two different stores have the same distribution of sales...Problem 46P:
A meteorologist wants to know if East and West Australia have the same distribution of storms. What...Problem 48P:
Use the following information to answer the next five exercises: Do private practice doctors and...Problem 49P:
Use the following information to answer the next five exercises: Do private practice doctors and...Problem 50P:
Use the following information to answer the next five exercises: Do private practice doctors and...Problem 51P:
Use the following information to answer the next five exercises: Do private practice doctors and...Problem 52P:
Use the following information to answer the next five exercises: Do private practice doctors and...Problem 53P:
Which test do you use to decide whether an observed distribution is the same as an expected...Problem 59P:
Test of a Single Variance Use the following information to answer the next three exercises: An...Problem 60P:
Test of a Single Variance Use the following information to answer the next three exercises: An...Problem 61P:
Test of a Single Variance Use the following information to answer the next three exercises: An...Problem 62P:
Use the following information to answer the next three exercises: The standard deviation of heights...Problem 63P:
Use the following information to answer the next three exercises: The standard deviation of heights...Problem 64P:
Use the following information to answer the next three exercises: The standard deviation of heights...Problem 65P:
Use the following information to answer the next four exercises: The average waiting time in a...Problem 66P:
Use the following information to answer the next four exercises: The average waiting time in a...Problem 67P:
Use the following information to answer the next four exercises: The average waiting time in a...Problem 68P:
Use the following information to answer the next four exercises: The average waiting time in a...Problem 69H:
As the number of degrees of freedom increases, the graph of the chi-square distribution looks more...Problem 72H:
A six-sided die is rolled 120 times. Fill in the expected frequency column. Then, conduct a...Problem 73H:
The marital status distribution of the U.S. male population, ages 15 and older, is as shown in Table...Problem 74H:
Use the following information to answer the next two exercises: The columns in Table 11.37 contain...Problem 75H:
Use the following information to answer the next two exercises: The columns in Table 11.37 contain...Problem 76H:
The City of South Lake Tahoe, CA, has an Asian population of 1,419 people, out of a total population...Problem 77H:
Use the following information to answer the next two exercises: UCLA conducted a survey of more than...Problem 78H:
Use the following information to answer the next two exercises: UCLA conducted a survey of more than...Problem 79H:
In a goodness-of-fit test, the expected values are the values we would expect if the null hypothesis...Problem 80H:
In general, if the observed values and expected values of a goodness-of-fit test are not close...Problem 81H:
Use a goodness-of-fit test to determine if high school principals believe that students are absent...Problem 83H:
In a goodness-of fit test, if the p-value is 0.0113, in general, do not reject the null hypothesis.Problem 84H:
A sample of 212 commercial businesses was surveyed for recycling one commodity; a commodity here...Problem 85H:
Table 11.42 contains information from a survey among 499 participants classified according to their...Problem 86H:
A recent debate about where in the United States skiers believe the skiing is best prompted the...Problem 87H:
Car manufacturers are interested in whether there is a relationship between the size of car an...Problem 88H:
College students may be interested in whether or not their majors have any effect on starting...Problem 89H:
Some travel agents claim that honeymoon hot spots vary according to age of the bride. Suppose that...Problem 90H:
A manager of a sports club keeps information concerning the main sport in which members participate...Problem 91H:
A major food manufacturer is concerned that the sales for its skinny french fries have been...Problem 92H:
According to Dan Lenard, an independent insurance agent in the Buffalo, N.Y. area, the following is...Problem 93H:
Suppose that 600 thirty-year-olds were surveyed to determine whether or not there is a relationship...Problem 94H:
The number of degrees of freedom for a test of independence is equal to the sample size minus one.Problem 96H:
The test to use when determining if the college or university a student chooses to attend is related...Problem 97H:
In a test of independence, the expected number is equal to the row total multiplied by the column...Problem 98H:
An ice cream maker performs a nationwide survey about favorite flavors of ice cream in different...Problem 99H:
Table 11.52 provides a recent survey of the youngest online entrepreneurs whose net worth is...Problem 100H:
A 2013 poll in California surveyed people about taxing sugar-sweetened beverages. The results are...Problem 101H:
A psychologist is interested in testing whether there is a difference in the distribution of...Problem 102H:
Do men and women select different breakfasts? The breakfasts ordered by randomly selected men and...Problem 103H:
A fisherman is interested in whether the distribution of fish caught in Green Valley Lake is the...Problem 104H:
In 2007, the United States had 1.5 million homeschooled students, according to the U.S. National...Problem 105H:
When looking at energy consumption, we are often interested in detecting trends over time and how...Problem 106H:
The Insurance Institute for Highway Safety collects safety information about all types of cars every...Problem 107H:
Is there a difference between the distribution of community college statistics students and the...Problem 108H:
If df = 2, the chi-square distribution has a shape that reminds us of the exponential.Problem 109H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 110H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 111H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 112H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 113H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 114H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 115H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 116H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 117H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 118H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 119H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 120H:
Test of a Single Variance Use the following information to answer the next twelve exercises: Suppose...Problem 121H:
A plant manager is concerned her equipment may need recalibrating. It seems that the actual weight...Problem 122H:
Consumers may be interested in whether the cost of a particular calculator varies from store to...Problem 123H:
Isabella, an accomplished Bay to Breakers runner, claims that the standard deviation for her time to...Problem 124H:
Airline companies are interested in the consistency of the number of babies on each flight, so that...Problem 125H:
The number of births per woman in China is 1.6 down from 5.91 in 1966. This fertility rate has been...Problem 126H:
According to an avid aquarist, the average number of fish in a 20-gallon tank is 10, with a standard...Problem 127H:
The manager of "Frenchies" is concerned that patrons are not consistently receiving the same amount...Problem 128H:
You want to buy a specific computer. A sales representative of the manufacturer claims that retail...Browse All Chapters of This Textbook
Chapter 1 - Sampling And DataChapter 2 - Descriptive StatisticsChapter 3 - Probability TopicsChapter 4 - Discrete Random VariablesChapter 5 - Continuous Random VariablesChapter 6 - The Normal DistributionChapter 7 - The Central Limit TheoremChapter 8 - Confidence IntervalsChapter 9 - Hypothesis Testing With One SampleChapter 10 - Hypothesis Testing With Two Samples
Book Details
Introductory Statistics follows the scope and sequence of a one-semester, introduction to statistics course and is geared toward students majoring in fields other than math or engineering. This text assumes students have been exposed to intermediate algebra, and it focuses on the applications of statistical knowledge rather than the theory behind it. The foundation of this textbook is Collaborative Statistics, by Barbara Illowsky and Susan Dean, which has been widely adopted. Introductory Statistics includes innovations in art, terminology, and practical applications, all with a goal of increasing relevance and accessibility for students. We strove to make the discipline meaningful and memorable, so that students can draw a working knowledge from it that will enrich their future studies and help them make sense of the world around them. The text also includes Collaborative Exercises, integration with TI-83,83+,84+ Calculators, technology integration problems, and statistics labs.
Sample Solutions for this Textbook
We offer sample solutions for Introductory Statistics homework problems. See examples below:
More Editions of This Book
Corresponding editions of this textbook are also available below:
INTRODUCTORY STATISTICS
13th Edition
ISBN: 2810015182961
Introductory Statistics
16th Edition
ISBN: 9781948847001
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