Problem 12.1TI: Is the following an example of a linear equation? y=0.1253.5x Problem 12.2TI: Is the following an example of a linear equation? Why or why not? Figure 12.3 Example 12.3 Problem 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 6P: Is the equation y=10+5x3x2 linear? Why or why not? Problem 7P: Which of the following equations are linear? a. y=6x+8 b. y+7=3x c. yx=8x2 d. 4y=8 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 17P: Does the scatter plot appear linear? Strong or weak? Positive or negative Figure 12.26 Problem 18P: Does the scatter plot appear linear? Strong or weak? Positive or negative? Figure 12.27 Problem 19P: Does the scatter plot appear linear? Strong or weak? Positive or negative? Figure 12.28 Problem 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 26P: When n = 2 and r = 1, are the data significant? Explain. Problem 27P: When n = 100 and r = -0.89, is there a significant correlation? Explain. 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 44P: Hand draw a smooth curve on the graph that shows the flow of the data. 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 50P: Find the correlation coefficient. a. correlation = _____ 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 63H: If there are 15 data points in a set of data, what is the number of degree of freedom? Problem 64H: What is the process through which we can calculate a line that goes through a scatter plot with a... Problem 65H: Explain what it means when a correlation has an r2 of 0.72. Problem 66H: Can a coefficient of determination be negative? Why or why not? 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... Problem 84BITH: Table 12.34 shows the average heights for American boy s in 1990. Age (years) Height (cm) birth 50.8... Problem 85BITH: State # letters in name Year entered the Union Ranks for entering the Union Area (squaremiles)... format_list_bulleted