Introductory Statistics1st EditionBarbara Illowsky, Susan Dean Publisher: OpenStax CollegeISBN: 9781938168208
Introductory Statistics
Solutions for Introductory Statistics
Problem 10.1TI:
Two samples are shown in Table 10.2. Both have normal distributions. The means for the two...Problem 10.2TI:
A study is done to determine if Company A retains its workers longer than Company B. Company A...Problem 10.5TI:
Weighted alpha is a measure of risk-adjusted performance of stocks over a period of a year. A high...Problem 10.6TI:
The means of the number of revolutions per minute of two competing engines are to be compared....Problem 10.8TI:
Two types of valves are being tested to determine if there is a difference in pressure tolerances....Problem 10.10TI:
A concerned group of citizens wanted to know if the proportion of forcible rapes in Texas was...Problem 10.11TI:
A study was conducted to investigate how effective a new diet was in lowering cholesterol. Results...Problem 10.12TI:
A new prep class was designed to improve SAT test scores. Five students were selected at random....Problem 10.13TI:
Five ball players think they can throw the same distance with their dominant hand (throwing) and...Problem 1P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 2P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 3P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 4P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 5P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 6P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 7P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 8P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 9P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 10P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 11P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 12P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 13P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 14P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 15P:
Two Population Means with Unknown Standard Deviations Use the following information to answer the...Problem 16P:
Use the following information to answer the next three exercises: A study is done to determine which...Problem 17P:
Use the following information to answer the next three exercises: A study is done to determine which...Problem 18P:
Use the following information to answer the next three exercises: A study is done to determine which...Problem 19P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 20P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 21P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 22P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 23P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 24P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 25P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 26P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 27P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 28P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 29P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 30P:
Use the following information to answer the next 12 exercises: The U.S. Center for Disease Control...Problem 31P:
Two Population Means with Known Standard Deviations Use the following information to answer the next...Problem 32P:
Two Population Means with Known Standard Deviations. Use the following information to answer the...Problem 33P:
Two Population Means with Known Standard Deviations Use the following information to answer the next...Problem 34P:
Two Population Means with Known Standard Deviations. Use the following information to answer the...Problem 35P:
Two Population Means with Known Standard Deviations Use the following information to answer the next...Problem 36P:
Use the following information to answer the next five exercises. A researcher is testing the effects...Problem 37P:
Use the following information to answer the next five exercises. A researcher is testing the effects...Problem 38P:
Use the following information to answer the next five exercises. A researcher is testing the effects...Problem 39P:
Use the following information to answer the next five exercises. A researcher is testing the effects...Problem 40P:
Use the following information to answer the next five exercises. A researcher is testing the effects...Problem 41P:
Use the following information to answer the next five exercises. Two metal alloys are being...Problem 42P:
Use the following information to answer the next five exercises. Two metal alloys are being...Problem 43P:
Use the following information to answer the next five exercises. Two metal alloys are being...Problem 44P:
Use the following information to answer the next five exercises. Two metal alloys are being...Problem 45P:
Use the following information to answer the next five exercises. Two metal alloys are being...Problem 46P:
Comparing Two Independent Population Proportions. Use the following information for the next five...Problem 47P:
Comparing Two Independent Population Proportions. Use the following information for the next five...Problem 48P:
Comparing Two Independent Population Proportions. Use the following information for the next five...Problem 49P:
Comparing Two Independent Population Proportions. Use the following information for the next five...Problem 50P:
Comparing Two Independent Population Proportions. Use the following information for the next five...Problem 51P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 52P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 53P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 54P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 55P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 56P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 57P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 58P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 59P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 60P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 61P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 62P:
Use the following information to answer the next twelve exercises. In the recent Census, three...Problem 63P:
Matched or Paired Samples Use the following information to answer the next five exercises. A study...Problem 64P:
Matched or Paired Samples Use the following information to answer the next five exercises. A study...Problem 65P:
Matched or Paired Samples Use the following information to answer the next five exercises. A study...Problem 66P:
Matched or Paired Samples Use the following information to answer the next five exercises. A study...Problem 67P:
Matched or Paired Samples Use the following information to answer the next five exercises. A study...Problem 68P:
Use the following information to answer next five exercises. A study was conducted to test the...Problem 69P:
Use the following information to answer next five exercises. A study was conducted to test the...Problem 70P:
Use the following information to answer next five exercises. A study was conducted to test the...Problem 71P:
Use the following information to answer next five exercises. A study was conducted to test the...Problem 72P:
Use the following information to answer next five exercises. A study was conducted to test the...Problem 73P:
Use the following information to answer the next five exercises. A doctor wants to know if a blood...Problem 74P:
Use the following information to answer the next five exercises. A doctor wants to know if a blood...Problem 75P:
Use the following information to answer the next five exercises. A doctor wants to know if a blood...Problem 76P:
Use the following information to answer the next five exercises. A doctor wants to know if a blood...Problem 77P:
Use the following information to answer the next five exercises. A doctor wants to know if a blood...Problem 78H:
The mean number of English courses taken in a twoyear time period by male and female college...Problem 79H:
A student at a four-year college claims that mean enrollment at fouryear colleges is higher than at...Problem 80H:
At Rachel’s 11th birthday party, eight girls were timed to see how long (in seconds) they could hold...Problem 81H:
Mean entry-level salaries for college graduates with mechanical engineering degrees and electrical...Problem 82H:
Marketing companies have collected data implying that teenage girls use more ring tones on their...Problem 83H:
Use the information from Appendix C to answer the next four exercises. Using the data from Lap 1...Problem 84H:
Use the information from Appendix C to answer the next four exercises. Repeat the test in Exercise...Problem 85H:
Use the information from Appendix C to answer the next four exercises. Repeat the test in Exercise...Problem 86H:
Use the information from Appendix C to answer the next four exercises. In two to three complete...Problem 87H:
Use the following information to answer the next two exercises. The Eastern and Western Major League...Problem 88H:
Use the following information to answer the next two exercises. The Eastern and Western Major League...Problem 89H:
Suppose a statistics instructor believes that there is no significant difference between the mean...Problem 90H:
Researchers interviewed street prostitutes in Canada and the United States. The mean age of the 100...Problem 91H:
A powder diet is tested on 49 people, and a liquid diet is tested on 36 different people. Of...Problem 92H:
Suppose a statistics instructor believes that there is no significant difference between the mean...Problem 93H:
A study is done to determine if students in the California state university system take longer to...Problem 94H:
Parents of teenage boys often complain that auto insurance costs more, on average, for teenage boys...Problem 95H:
A group of transfer bound students wondered if they will spend the same mean amount on texts and...Problem 96H:
Some manufacturers claim that non-hybrid sedan cars have a lower mean miles-per-gallon (mpg) than...Problem 97H:
A baseball fan wanted to know if there is a difference between the number of games played in a World...Problem 98H:
One of the questions in a study of marital satisfaction of dual-career couples was to rate the...Problem 99H:
A recent drug survey showed an increase in the use of drugs and alcohol among local high school...Problem 100H:
We are interested in whether the proportions of female suicide victims for ages 15 to 24 are the...Problem 101H:
Elizabeth Mjelde, an art history professor, was interested in whether the value from the Golden...Problem 102H:
A recent year was randomly picked from 1985 to the present. In that year, there were 2,051 Hispanic...Problem 103H:
Use the following information to answer the next three exercises. Neuroinvasive West Nile virus is a...Problem 104H:
Use the following information to answer the next three exercises. Neuroinvasive West Nile virus is a...Problem 105H:
Use the following information to answer the next three exercises. Neuroinvasive West Nile virus is a...Problem 106H:
Researchers conducted a study to find out if there is a difference in the use of eReaders by...Problem 107H:
Adults aged 18 years old and older were randomly selected for a survey on obesity. Adults are...Problem 108H:
Two computer users were discussing tablet computers. A higher proportion of people ages 16 to 29 use...Problem 109H:
A group of friends debated whether more men use smartphones than women. They consulted a research...Problem 110H:
While her husband spent 21/2. hours picking out new speakers, a statistician decided to determine...Problem 111H:
We are interested in whether children’s educational computer software costs less, on average, than...Problem 112H:
Joan Nguyen recently claimed that the proportion of college-age males with at least one pierced ear...Problem 113H:
Use the data sets found in Appendix C to answer this exercise. Is the proportion of race laps Terri...Problem 114H:
"To Breakfast or Not to Breakfast?" by Richard Ayore In the American society, birthdays are one of...Problem 115H:
Ten individuals went on a lowfat diet for 12 weeks to lower their cholesterol. The data are recorded...Problem 116H:
Use the following information to answer the next two exercises. A new AIDS prevention drug was tried...Problem 117H:
Use the following information to answer the next two exercises. A new AIDS prevention drug was tried...Problem 118H:
Use the following information to answer the next two exercises. An experiment is conducted to show...Problem 119H:
Use the following information to answer the next two exercises. An experiment is conducted to show...Problem 120H:
A golf instructor is interested in determining if her new technique for improving players’ golf...Problem 121H:
A local cancer support group believes that the estimate for new female breast cancer cases in the...Problem 122H:
A traveler wanted to know if the prices of hotels are different in the ten cities that he visits the...Problem 123H:
A politician asked his staff to determine whether the underemployment rate in the northeast...Problem 124BITH:
A powder diet is tested on 49 people, and a liquid diet is tested on 36 different people. The...Problem 125BITH:
A new chocolate bar is taste-tested on consumers. Of interest is whether the proportion of children...Problem 126BITH:
The mean number of English courses taken in a twoyear time period by male and female college...Problem 127BITH:
A football league reported that the mean number of touchdowns per game was five. A study is done to...Problem 128BITH:
A study is done to determine if students in the California state university system take longer to...Problem 129BITH:
According to a YWCA Rape Crisis Center newsletter, 75% of rape victims know their attackers. A study...Problem 130BITH:
According to a recent study, U.S. companies have a mean maternity-leave of six weeks.Problem 131BITH:
A recent drug survey showed an increase in use of drugs and alcohol among local high school students...Problem 132BITH:
A new SAT study course is tested on 12 individuals. Pre-course and post-course scores are recorded....Problem 133BITH:
University of Michigan researchers reported in the Journal of the National Cancer Institute that...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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