INTRODUCTORY STATISTICS (LOOSELEAF)3rd EditionGould Publisher: PEARSONISBN: 9780135163146
INTRODUCTORY STATISTICS (LOOSELEAF)
Solutions for INTRODUCTORY STATISTICS (LOOSELEAF)
Problem 1SE:
Ages A study of all the students at a small college showed a mean age of 20.7 and a standard...Problem 2SE:
Units A survey of 100 random full-time students at a large university showed the mean number of...Problem 3SE:
Exam Scores The distribution of the scores on a certain exam is N80,5 which means that the exam...Problem 4SE:
Exam Scores The distribution of the scores on a certain exam is N100,10 which means that the exam...Problem 5SE:
Showers According to home-water-works.org, the average shower in the United States lasts 8.2...Problem 6SE:
Smartphones According to a 2017 report by ComScore .com, the mean time spent on smartphones daily by...Problem 7SE:
Retirement Income Several times during the year, the U.S. Census Bureau takes random samples from...Problem 8SE:
Time Employed A human resources manager for a large company takes a random sample of 50 employees...Problem 9SE:
Driving (Example 1) Drivers in Wyoming drive more miles yearly than motorists in any other state....Problem 10SE:
Driving Drivers in Alaska drive fewer miles yearly than motorists in any other state. The annual...Problem 11SE:
Babies Weights (Example 2) Some sources report that the weights of full-term newborn babies have a...Problem 12SE:
Babies’ Weights, Again Some sources report that the weights of full-term newborn babies have a mean...Problem 13SE:
(Example 3) Income in Maryland According to a 2018 Money magazine article, Maryland has one of the...Problem 14SE:
Income in Kansas According to a 2018 Money magazine article, the average income in Kansas is...Problem 15SE:
CLT Shapes (Example 4) One of the histograms is a histogram of a sample (from a population with a...Problem 16SE:
Used Van Costs One histogram shows the distribution of costs for all used Toyota Sienna vans for...Problem 17SE:
(Example 5) Age of Used Vans The mean age of all 118 used Toyota vans for sale (see exercise 9.16 )...Problem 18SE:
Student Ages The mean age of all 2550 students at a small college is 22.8 years with a standard...Problem 23SE:
Private University Tuition (Example 7) A random sample of 25 private universities was selected. A 95...Problem 24SE:
Random Numbers If you take samples of 40 lines from a random number table and find that the...Problem 25SE:
t* (Example 8) A researcher collects one sample of 27 measurements from a population and wants to...Problem 26SE:
t* A researcher collects a sample of 25 measurements from a population and wants to find a 99...Problem 27SE:
Heights of 12th Graders (Example 9) A random sample of 30 12th-grade students was selected. The...Problem 28SE:
Drinks A fast-food chain sells drinks that it calls HUGE. When we take a sample of 25 drinks and...Problem 29SE:
Men’s Pulse Rates (Example 10) A random sample of 25 men’s resting pulse rates shows a mean of 72...Problem 30SE:
Travel Time to School A random sample of 50 12th-grade students was asked how long it took to get to...Problem 31SE:
RBIs (Example 11) A random sample of 25 baseball players from the 2017 Major League Baseball season...Problem 32SE:
RBIs Again In exercise 9.31, two intervals were given for the same data, one for 95 confidence and...Problem 33SE:
Confidence Interval Changes State whether each of the following changes would make a confidence...Problem 34SE:
Confidence Interval Changes State whether each of the following changes would make a confidence...Problem 35SE:
Potatoes The weights of four randomly and independently selected bags of potatoes labeled 20 pounds...Problem 36SE:
Tomatoes The weights of four randomly and independently selected bags of tomatoes labeled 5 pounds...Problem 37SE:
Human Body Temperatures (Example 12) A random sample of 10 independent healthy people showed the...Problem 38SE:
Reaction Distance Data on the disk and website show reaction distances in centimeters for the...Problem 39SE:
Potatoes Use the data from exercise 9.35. a. If you use the four-step procedure with a two-sided...Problem 40SE:
Tomatoes Use the data from exercise 9.36. a. Using the four-step procedure with a two-sided...Problem 41SE:
Cholesterol In the U.S. Department of Health has suggested that a healthy total cholesterol...Problem 42SE:
BMI A body mass index (BMI) of more than 25 is considered unhealthy. The Minitab output given is...Problem 43SE:
Male Height In the United States, the population mean height for 3-year-old boys is 38 inches...Problem 44SE:
Female Height In the United States, the population mean height for 10-year-old girls is 54.5 inches....Problem 45SE:
Deflated Footballs? Patriots In the 2015 AFC Championship game, there was a charge the New England...Problem 46SE:
Deflated Footballs? Colts In the 2015 AFC Championship game, there was a charge the New England...Problem 47SE:
Movie Ticket Prices According to Deadline.com, the average price for a movie ticket in 2018 was...Problem 48SE:
Broadway Ticket Prices According to Statista.com, the average price of a ticket to a Broadway show...Problem 49SE:
Atkins Diet Difference Ten people went on an Atkins diet for a month. The weight losses experienced...Problem 50SE:
Pulse Difference The following numbers are the differences in pulse rate (beats per minute) before...Problem 51SE:
Student Ages Suppose that 200 statistics students each took a random sample (with replacement) of 50...Problem 52SE:
Presidents’ Ages at Inauguration A 95 confidence interval for the ages of the first six presidents...Problem 53SE:
Independent or Paired (Example 13) State whether each situation has independent or paired...Problem 54SE:
Independent or Paired State whether each situation has independent or paired (dependent) samples. a....Problem 55SE:
Televisions: CI (Example 14) Minitab output is shown for a two-sample t-interval for the number of...Problem 56SE:
Pulse and Gender: CI Using data from NHANES, we looked at the pulse rate for nearly 800 people to...Problem 57SE:
Televisions (Example 15) The table shows the Minitab output for a two-sample t-test for the number...Problem 58SE:
Pulse Rates Using data from NHANES, we looked at the pulse rates of nearly 800 people to see whether...Problem 59SE:
Triglycerides Triglycerides are a form of fat found in the body. Using data from NHANES, we looked...Problem 60SE:
Systolic Blood Pressures When you have your blood pressure taken, the larger number is the systolic...Problem 61SE:
Triglycerides, Again Report and interpret the 95 confidence interval for the difference in mean...Problem 62SE:
Blood Pressures, Again Report and interpret the 95 confidence interval for the difference in mean...Problem 63SE:
Baseball Salaries A random sample of 40 professional baseball salaries from 1985 through 2015 was...Problem 64SE:
College Athletes’ Weights A random sample of male college baseball players and a random sample of...Problem 65SE:
Baseball Salaries In exercise 9.63 you could not reject the null hypothesis that the mean salary for...Problem 66SE:
College Athletes’ Weights In exercise 9.64, you could reject the null hypothesis that the mean...Problem 67SE:
Textbook Prices, UCSB vs. CSUN (Example 16) The prices of a sample of books at University of...Problem 68SE:
Textbook Prices. OC vs. CSUN The prices of a random sample of comparable (matched) textbooks from...Problem 69SE:
Females’ Pulse Rates before and after a Fright (Example 17) In a statistics class taught by one of...Problem 70SE:
Males’ Pulse Rates before and after a Fright Follow the instructions for exercise 9.69, but use the...Problem 71SE:
Organic Food A student compared organic food prices at Target and Whole Foods. The same items were...Problem 72SE:
Body Temperature The body temperatures of 65 men and 65 women were compared. The results of a...Problem 73SE:
Ales vs. IPAs Data were collected on calorie content in ales and IPAs and is summarized in the...Problem 74SE:
Surfers Surfers and statistics students Rex Robinson and Sandy Hudson collected data on the number...Problem 75SE:
Self-Reported Heights of Men (Example 18) A random sample of students at Oxnard College reported...Problem 76SE:
Eating Out Jacqueline Loya, a statistics student, asked students with jobs how many times they went...Problem 78SE:
Self-Driving Cars A survey of asked respondents how long (in years) they thought it would be before...Problem 79CRE:
Women’s Heights Assume women’s heights are approximately Normally distributed with a mean of 65...Problem 80CRE:
Showers According to home-water-works.org, the average shower in the United States lasts 8.2...Problem 81CRE:
Choose a test for each situation: one-sample t-test, two-sample t-test, paired t-test, and no...Problem 82CRE:
Choose a t-test for each situation: one-sample t-test, two-sample t-test, paired t-test, and no...Problem 83CRE:
Cones: 3 Tests A McDonald’s fact sheet says its cones should weigh 3.18 ounces (converted from...Problem 85CRE:
Brain Size Brain size for 20 random women and 20 random men was obtained and is reported in the...Problem 86CRE:
Reducing Pollution A random sample of 12th-grade students were asked to rate the importance of...Problem 87CRE:
Heart Rate before and after Coffee Elena Lucin, a statistics student, collected the data in the...Problem 88CRE:
Exam Grades The final exam grades for a sample of day-time statistics students and evening...Problem 89CRE:
Hours of Television Viewing The number of hours per week of television viewing for random samples of...Problem 90CRE:
Reaction Distances Reaction distances in centimeters for a random sample of 40 college students were...Problem 91CRE:
Ales vs. Lagers Data were collected on calorie content for a random sample of ales and lagers and...Problem 92CRE:
Weights of Hockey and Baseball Players Data were collected on the weights of random samples of...Problem 93CRE:
Grocery Delivery The table shows the prices for identical groceries at two online grocery delivery...Problem 94CRE:
Parents The following table shows the heights (in inches) of a random sample of students and their...Problem 95CRE:
Why Is n1 in the Sample Standard Deviation? Why do we calculate s by dividing by n1, rather than...Browse All Chapters of This Textbook
Chapter 1 - Introduction To DataChapter 2 - Picturing Variation With GraphsChapter 3 - Numerical Summaries Of Center And VariationChapter 4 - Regression Analysis: Exploring Associations Between VariablesChapter 5 - Modeling Variation With ProbabilityChapter 6 - Modeling Random Events: The Normal And Binomial ModelsChapter 7 - Survey Sampling And InferenceChapter 8 - Hypothesis Testing For Population ProportionsChapter 9 - Inferring Population MeansChapter 10 - Associations Between Categorical Variables
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