Statistics and Probability Sample Questions and Answers

Statistics and Probability Sample Questions and Answers 1. What is the best description of the relationship in the scatter plot? A. Positive Correlation B. Negative Correlation C. Zero Correlation D. No Correlation 2. What is the best description of the relationship in the scatter plot? A. Positive Correlation B. Negative Correlation C. Zero Correlation D. No Correlation 3. What is an example of a nonlinear equation? A. y=-3x+5 B. 4x + 2y =12 C. y=x - √36 D. y= 𝑥𝑥 2 + 7 4. A scatter plot has a negative correlation, which equation for the line of best fit would best represent the scatter plot. A. y=4 B. x=-5 C. y=-3x + 6 D. y=-6 + 2x 5. A scatter plot represents the positive relationship between two variables. Which description is not likely modeled by the scatter plot? A. The amount of work completed for a class, x, and the grade on the assessment, y B. The temperature, x, and the sales at Superb Slushies, y C. The husband’s age, x, and the wife’s age, y D. The age of person, x, and the number of sports participated in, y 6. Which of the points labeled below is an outlier. B D C A 7. What is the best description of the relationship in the scatter plot? A. Positive Correlation B. Negative Correlation C. Zero Correlation D. No Correlation 8. The scatter plot shows the heights and weights of a group of people. Use the trend line or line of best fit to predict the weight of someone who is 57 inches tall. A. 105 pounds B. 78 pounds C. 62 pounds D. 100 pounds 9. Chase is collecting data comparing the cooling costs and the temperature outside during the summer. What variable would be used as the dependent variable, when he creates the scatter plot? A. Outside temperature B. Cooling costs C. Hours of daylight D. date 10. The scatter plot below shows weight gain and calories consume. Which statement accurately describes the relationship in the graph? A. As calories consumed increases, weight gained decreases B. As calories consumed increases, weight gained does not change C. As calories consumed increases, weight gained increases D. As calories consumed decreases, weight gained increases 11. Which set of ordered pairs represents a linear relationship? A. {(-2, 1) , (-3, 7), (-4, -8)} B. {(-2, 1) , (-3, 7), (-4, 13)} C. {(-2, -100) , (-3, -6), (-4, -50)} D. {(-2, 4) , (-3, 9), (-4, 16)} 12. Which equation models the data in the scatter plot most accurately? A. B. C. D. y= x + 2 y= -x + 2 y= ½ x – 5 y= x +8 13. The scatter plot shows absences for a class compared with the exam score. Predict the exam score for a student with 3 absences. A. 82 B. 90 C. 75 D. 65 14. Which equation of a line contains the following set of ordered pairs? {(9, -6), (0, 3), (-3, 6)} A. y=x+3 B. y=-2x + 12 C. y=-2x D. y=-x + 3 15. Data for 10 students’ Language Arts and Social Studies scores are provided in the chart. Describe the association between the Math and Science scores. Student 1 2 3 4 5 6 7 8 9 10 LA 64 50 85 34 56 24 72 63 42 93 S.S. 68 70 83 33 60 27 74 63 40 96 A. Positive B. Negative C. No D. Zero 16. Use the two-way table comparing people born in North Carolina to people who have visited Disney World. Visited Disney World Not Visited Disney World Total Born in NC Not Born in NC 7 9 12 Total 17 33 Of the students born in North Carolina, what percentage of them has been to Disney World? Round the percent to the nearest whole. A. 78% B. 20% C. 58% D. 75% 17. A survey was conducted among high school and middle school students. They were asked whether they preferred soccer or baseball. Use the following two-way table to answer the question. Prefer Soccer Prefer Baseball High School Students 12 13 Middle School Students 13 7 What percentage of middle school students prefers soccer? A. 13% B. 35 % C. 65% D. 7% 18. An insurance company tracks the number of speeding tickets by car color. Use the following table to determine which statement is true. Car Color Received a speeding Ticket Yes No Black 2 18 Blue 1 19 Red 2 6 White 6 19 A. There are more drivers that drive red or white cars than black cars. B. There are an equal number of people who drive blue and white cars. C. People who drive red cars have the highest probability of receiving a speeding ticket. D. Drivers of a blue car are more likely to get a speeding ticket than drivers of Black cars. 19. Students at an elementary school are surveyed as to whether they buy lunch from the cafeteria on a regular basis. Use the table below to determine the grade level with the greatest percentage of people who buy lunch at school. Grade Level Yes No K 10 40 2 70 60 3 30 10 5 30 70 A. K B. 2 C. 3 D. 5 20. The scatter plot shows the capacity of a refrigerator and the cost. Using the scatter plot and trend line, predict the capacity for a refrigerator that costs $ 600. A. 15 cubic feet B. 13 cubic feet C. 18 cubic feet D. 25 cubic feet Answer Key: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. A B D C D A D B B C B A A D A C C A C A