Introductory Statistics1st EditionBarbara Illowsky, Susan Dean Publisher: OpenStax CollegeISBN: 9781938168208
Introductory Statistics
Solutions for Introductory Statistics
Problem 12.1TI:
Is the following an example of a linear equation? y=0.1253.5xProblem 12.2TI:
Is the following an example of a linear equation? Why or why not? Figure 12.3 Example 12.3Problem 12.3TI:
Emma’s Extreme Sports hires hang-gliding instructors and pays them a fee of $50 per class as well as...Problem 12.4TI:
Ethan repairs household appliances like dishwashers and refrigerators. For each visit, he charges...Problem 12.5TI:
Amelia plays basketball for her high school. She wants to improve to play at the college level. She...Problem 12.6TI:
SCUBA divers have maximum dive times they cannot exceed when going to different depths. The data in...Problem 12.7TI:
For a given line of best fit, you computed that r = 0.6501 using n = 12 data points and the critical...Problem 12.8TI:
For a given line of best fit, you compute that r = 0.5204 using n = 9 data points, and the critical...Problem 12.9TI:
For a given line of best fit, you compute that r = 0.7204 using n = 8 data points, and the critical...Problem 12.10TI:
For a given line of best fit, you compute that r = 0 using n = 100 data points. Can the line be used...Problem 12.11TI:
Data are collected on the relationship between the number of hours per week practicing a musical...Problem 12.12TI:
Identify the potential outlier in the scatter plot. The standard deviation of the residuals or...Problem 12.13TI:
The data points for the graph from the third exam/final exam example are as follows: (1, 5), (2, 7),...Problem 12.14TI:
The following table shows economic development measured in per capita income PCINC. Year PCINC Year...Problem 1P:
Linear Equations Use the following information to answer the next three exercises. A vacation resort...Problem 2P:
Linear Equations Use the following information to answer the next three exercises. A vacation resort...Problem 3P:
Linear Equations Use the following information to answer the next three exercises. A vacation resort...Problem 4P:
Use the following information to answer the next two exercises. A credit card company charges $10...Problem 5P:
Use the following information to answer the next two exercises. A credit card company charges $10...Problem 8P:
Does the graph show a linear equation? Why or why not? Figure 12.25 Table 12.12 contains real data...Problem 9P:
Use the columns "year" and "# flu cases diagnosed. Why is “year” the independent variable and “# flu...Problem 10P:
Use the following information to answer the next two exercises. A specialty cleaning company charges...Problem 11P:
Use the following information to answer the next two exercises. A specialty cleaning company charges...Problem 12P:
Use the following information to answer the next three questions. Due to erosion, a river shoreline...Problem 13P:
Use the following information to answer the next three questions. Due to erosion, a river shoreline...Problem 14P:
Use the following information to answer the next three questions. Due to erosion, a river shoreline...Problem 15P:
Use the following information to answer the next two exercises. The price of a single issue of stock...Problem 16P:
Use the following information to answer the next two exercises. The price of a single issue of stock...Problem 18P:
Does the scatter plot appear linear? Strong or weak? Positive or negative? Figure 12.27Problem 19P:
Does the scatter plot appear linear? Strong or weak? Positive or negative? Figure 12.28Problem 20P:
The Regression Equation Use the following information to answer the next five exercises. A random...Problem 21P:
The Regression Equation Use the following information to answer the next five exercises. A random...Problem 22P:
The Regression Equation Use the following information to answer the next five exercises. A random...Problem 23P:
The Regression Equation Use the following information to answer the next five exercises. A random...Problem 24P:
The Regression Equation Use the following information to answer the next five exercises. A random...Problem 25P:
What does an r value of zero mean?Problem 28P:
When testing the significance of the correlation coefficient, what is the null hypothesis?Problem 29P:
When testing the significance of the correlation coefficient, what is the alternative hypothesis?Problem 30P:
If the level of significance is 0.05 and the p-value is 0.04, what conclusion can you draw?Problem 31P:
Use the following information to answer the next two exercises. An electronics retailer used...Problem 32P:
Use the following information to answer the next two exercises. An electronics retailer used...Problem 33P:
Use the following information to answer the next three exercises. A landscaping company is hired to...Problem 34P:
Use the following information to answer the next three exercises. A landscaping company is hired to...Problem 35P:
Use the following information to answer the next three exercises. A landscaping company is hired to...Problem 36P:
Graph “year” versus “# flu cases diagnosed” (plot the scatter plot). Do not include pre-1981 data.Problem 37P:
Perform linear regression. What is the linear equation? Round to the nearest whole number.Problem 38P:
Find the correlation coefficient. a. r = ________Problem 39P:
Solve. a. When x = 1985, y = _____ b. When x = 1990, y =_____ c. When x = 1970, y =______ Why...Problem 40P:
Does the line seem to fit the data? Why or why not?Problem 41P:
What does the correlation imply about the relationship between time (years) and the number of...Problem 42P:
Plot the two given points on the following graph. Then, connect the two points to form the...Problem 43P:
Write the equation: y= ____________Problem 45P:
Does the line seem to fit the data? Why or why not?Problem 46P:
Do you think a linear fit is best? Why or why not?Problem 47P:
What does the correlation imply about the relationship between time (years) and the number of...Problem 48P:
Graph “year” vs. “# flu cases diagnosed.” Do not include pre-1981. Label both axes with words. Scale...Problem 49P:
Enter your data into your calculator or computer. The pre-1981 data should not be included. Why is...Problem 51P:
Outliers Use the following information to answer the next four exercises. The scatter plot shows the...Problem 52P:
Outliers Use the following information to answer the next four exercises. The scatter plot shows the...Problem 53P:
Outliers Use the following information to answer the next four exercises. The scatter plot shows the...Problem 54P:
Outliers Use the following information to answer the next four exercises. The scatter plot shows the...Problem 55P:
The Sum of Squared Errors for a data set of 18 numbers is 49. What is the standard deviation?Problem 56P:
The Standard Deviation for the Sum of Squared Errors for a data set is 9.8. What is the cutoff for...Problem 57H:
For each of the following situations, state the independent variable and the dependent variable. a....Problem 58H:
Piece-rate systems are widely debated incentive payment plans. In a recent study of loan officer...Problem 59H:
The Gross Domestic Product Purchasing Power Parity is an indication of a country’s currency value...Problem 60H:
The following table shows the poverty rates and cell phone usage in the United States. Construct a...Problem 61H:
Does the higher cost of tuition translate into higher-paying jobs? The table lists the top ten...Problem 62H:
If the level of significance is 0.05 and the p-value is 0.06, what conclusion can you draw?Problem 64H:
What is the process through which we can calculate a line that goes through a scatter plot with a...Problem 67H:
Recently, the annual number of driver deaths per 100,000 for the selected age groups was as follows:...Problem 68H:
Table 12.20 shows the life expectancy for an individual born in the United States in certain years....Problem 69H:
The maximum discount value of the Entertainment® card for the “Fine Dining” section, Edition ten,...Problem 70H:
Table 12.22 gives the gold medal times for every other Summer Olympics for the women’s 100-meter...Problem 71H:
State # letters in name Year entered the Union Rank for entering the Union Area (squaremiles)...Problem 72H:
The height (sidewalk to roof) of notable tall buildings in America is compared to the number of...Problem 73H:
Ornithologists, scientists who study birds, tag sparrow hawks in 13 different colonies to study...Problem 74H:
The following table shows data on average per capita coffee consumption and heart disease rate in a...Problem 75H:
The following table consists of one student athlete’s time (in minutes) to swim 2000 yards and the...Problem 76H:
A researcher is investigating whether population impacts homicide rate. He uses demographic data...Problem 77H:
School Mid-Career Salary (in thousands) Yearly Tuition Princeton 137 28,540 Harvey Mudd 135 40,133...Problem 78BITH:
The average number of people in a family that attended college for various years is given in Table...Problem 79BITH:
The percent of female wage and salary workers who are paid hourly rates is given in Table 12.30 for...Problem 80BITH:
Use the following information to answer the next two exercises. The cost of a leading liquid laundry...Problem 81BITH:
Use the following information to answer the next two exercises. The cost of a leading liquid laundry...Problem 82BITH:
According to a flyer by a Prudential Insurance Company representative, the costs of approximate...Problem 83BITH:
The following are advertised sale prices of color televisions at Anderson’s. Size (inches) Sale...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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