This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Commerce > Economics Statistics For Economics > Class 11 Economics (Statistics For Economics) Chapter 7 Correlation – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Economics (Statistics For Economics) Chapter 7 Correlation Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What does standard deviation represent? A) How spread out each data value is from the mean. B) How many different variations are in the data set. C) The range, but with a bunch of other stuff going on. D) How the population varies compared to the sample. Show Answer Correct Answer: A) How spread out each data value is from the mean. 2. A correlation of-.90 between two sets of scores indicates that people who earned high scores on their first SAT generally earned ..... scores on the second. A) High. B) Low. C) Average. D) Statistically significant. Show Answer Correct Answer: B) Low. 3. ..... correlation is when one set of data increases and the other set of data decreases. A) Positive. B) Negative. C) No. D) None of the above. Show Answer Correct Answer: B) Negative. 4. Name the correlation in this sentence:A runner's time and the distance to the finish line. A) Positive Correlation. B) Lots of Correlation. C) Negative Correlation. D) No Correlation. Show Answer Correct Answer: C) Negative Correlation. 5. Correlations show cause and effect A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 6. The correlation coefficient, is always between ..... and ..... A) 0 and 1. B) -1 and 1. C) -1 and 0. D) 0 and 10. Show Answer Correct Answer: B) -1 and 1. 7. A perfect negative correlation has a correlation coefficient of ..... A) 1. B) -1. C) 0. D) None of the above. Show Answer Correct Answer: B) -1. 8. What is reliability? A) The consistency and reproducibility of a given result. B) The accuracy of a given result in measuring what it is designed to measure. C) Seeing relationships between two things when no such relationship exists. D) Two variables change in the same direction. Show Answer Correct Answer: A) The consistency and reproducibility of a given result. 9. How do you calculate a residual? A) Observed-Predicted. B) Predicted-Observed. C) All the above. D) None of the above. Show Answer Correct Answer: A) Observed-Predicted. 10. R is affected by influential points. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 11. What type of correlation exists between the amount of time a candle is burned and the height of the candle. A) Positive. B) Negative. C) None. D) None of the above. Show Answer Correct Answer: B) Negative. 12. What would you use to determine whether significant differences were observed between all levels of your independent variable? A) F statistic. B) Post-hoc tests. C) Box-plots. D) Descriptive statistics. Show Answer Correct Answer: B) Post-hoc tests. 13. Spending time with animals reduces stress.Independent variable: ..... A) Stress level. B) The amount of time spent with animals. C) The number of animals you own. D) How much money you make. Show Answer Correct Answer: B) The amount of time spent with animals. 14. The direction of a correlation can be positive or negative. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 15. What type of correlation (association)?The outside temperature and the amount of layers you wear. A) Positive correlation. B) Negative correlation. C) No correlation. D) All of the above. Show Answer Correct Answer: B) Negative correlation. 16. You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values? A) As x increases, y decreases. B) As x increases, y increases. C) As x decreases, y decreases. D) None of the above. Show Answer Correct Answer: A) As x increases, y decreases. 17. Variables X and Y have r = 0.40. If we decrease each X value by 0.1, double each Y value, and then interchange them (put X on the Y-axis and vice versa) the new correlation will be A) -0.40. B) 0.60. C) 0.15. D) 0.40. Show Answer Correct Answer: D) 0.40. 18. Number of days absent from school vs. math average A) Positive Correlation. B) Negative Correlation. C) No Correlation. D) None of the above. Show Answer Correct Answer: B) Negative Correlation. 19. Score on science exam and number of words written on the essay question. $r=.28$ A) Weak positive. B) Strong negative. C) Strong positive. D) Weak negative. Show Answer Correct Answer: A) Weak positive. 20. ALL but one of the statements below contains a mistake. Which one could be true? A) The correlations between the time it takes to get ready in the morning and gender is 0.78. B) The number of apricots on a tree and the amont of fertilizer has a 1.12 correlation. C) The correlation between the height of a bean plant and the day is 0.78 in/day. D) The correlations between your golf score and the number of hours you practice is-0.36. Show Answer Correct Answer: D) The correlations between your golf score and the number of hours you practice is-0.36. 21. Which of the following is true for correlation coefficients? A) X is the explanatory variable and y is the response variable. B) X is the response variable and y is the explanatory variable. C) The choice of x and y as the explanatory and response variables does not matter. D) None of the above. Show Answer Correct Answer: C) The choice of x and y as the explanatory and response variables does not matter. 22. R is only useful for ..... A) Quadratic functions. B) Linear functions. C) All the above. D) None of the above. Show Answer Correct Answer: B) Linear functions. 23. What is a scatter plot? A) A line that represents the equation of a straight line. B) Data that involves two variables. C) A graph that shows a relationship between two sets of data. D) A measure of how closely the points in a scatter plot cluster around the line of best fit. Show Answer Correct Answer: C) A graph that shows a relationship between two sets of data. 24. Describe the correlation: "The number of pages you have read in a book and the number of pages remaining." A) Positive. B) Negative. C) None. D) None of the above. Show Answer Correct Answer: B) Negative. 25. If the correlation coefficient, r, of a data set is r =-0.95. What type of correlation does the data have? A) Strong negative. B) Weak Postive. C) No correlation. D) Strong Positive. E) Weak Negative. Show Answer Correct Answer: A) Strong negative. 26. Calculate the correlation coefficient for this data set and round to 3 places after the decimal.(5, 24), (8, 18), (13, 16) A) $-.911$. B) -.911 Mathematical EquivalenceON. C) All the above. D) None of the above. Show Answer Correct Answer: A) $-.911$. 27. The correlation coefficient, r, is given for several different linear models for a data set. Which value for r indicates the weakest best fit for the data? A) 0.01. B) -0.85. C) -0.34. D) -0.98. Show Answer Correct Answer: A) 0.01. 28. What does the correlation coefficient represent? A) The strength and direction of the relationship between variables. B) The consistency and reproducibility of a given result. C) The accuracy of a given result in measuring what it is designed to measure. D) Seeing relationships between two things when no such relationship exists. Show Answer Correct Answer: A) The strength and direction of the relationship between variables. 29. ANOVA testing is used for ..... A) Test for independence between two variables. B) Test for one mean. C) Test for two means. D) Test for three or more means. Show Answer Correct Answer: D) Test for three or more means. 30. The correlation of the following pairs of variables can be calculated using the Pearson's sample correlation coefficient except for one. Which of the following is not included? A) Height and arm span. B) Age and weight. C) Age and gender. D) IQ level and grade-point average. Show Answer Correct Answer: C) Age and gender. 31. How many independent and dependent variables are there in a One-Way Within Groups ANOVA? A) 1 independent variable and 1 dependent variable. B) 2 independent variables and 1 dependent variable. C) 1 independent variable and 3 dependent variables. D) 1 independent variable and 2 dependent variable. Show Answer Correct Answer: A) 1 independent variable and 1 dependent variable. 32. What is correlation? A) The consistency and reproducibility of a given result. B) The accuracy of a given result in measuring what it is designed to measure. C) The relationship between two or more variables. D) Seeing relationships between two things when no such relationship exists. Show Answer Correct Answer: C) The relationship between two or more variables. 33. Select all the values for r that indicate no relationship in scatter plot. A) 0. B) 0.5. C) -1. D) -0.5. E) 1. Show Answer Correct Answer: A) 0. 34. A study compared the number of years of education and a person's annual salary. The correlation coefficient of the data was r = 0.913. Which conclusion can be made using the correlation coefficient? A) There is a strong negative correlation. B) There is a weak positive correlation. C) There is a strong positive correlation. D) There is no correlation. Show Answer Correct Answer: C) There is a strong positive correlation. 35. Number of pets a person has and number of books a person has read A) Positive Correlation. B) Negative Correlation. C) No Correlation. D) None of the above. Show Answer Correct Answer: C) No Correlation. 36. In order to graphically represent a correlation between two variables researchers construct a ..... A) Scatterplot. B) Skewed distribution. C) Normal curve. D) Histogram. Show Answer Correct Answer: A) Scatterplot. 37. What is the placebo effect? A) The consistency and reproducibility of a given result. B) The accuracy of a given result in measuring what it is designed to measure. C) People's expectations or beliefs influencing or determining their experience. D) Two variables change in different directions. Show Answer Correct Answer: C) People's expectations or beliefs influencing or determining their experience. 38. If the correlation coefficient of a table of data is 0.85, what is true about the line of best fit? A) There is a strong, positive relationship. B) There is a strong, negative relationship. C) There is a weak, negative relationship. D) There is a weak, positive relationship. Show Answer Correct Answer: A) There is a strong, positive relationship. 39. Which is the best description of the y-intercept for the linear regression equation of the rats:Weight = 100 + 40(Time)? A) 100 is where the data starts on the y-axis. B) The y-intercept is 100, which is where the graph crosses the y-axis. C) The y-intercept is 100, which means the rat is predicted to weigh 100 grams at birth. D) The y-intercept is 100, which means at a weight of 0, the rat will take 100 seconds. Show Answer Correct Answer: C) The y-intercept is 100, which means the rat is predicted to weigh 100 grams at birth. 40. If the correlation coefficient, r, of a data set is r = 0. 32. What type of correlation does the data have? A) Weak Negative. B) Strong negative. C) Strong Positive. D) No correlation. E) Weak Postive. Show Answer Correct Answer: E) Weak Postive. 41. Which situation best shows causation? A) The length of a rectangle affects the width of the rectangle. B) The amount of time a cell phone is used affects the charge of its battery. C) The number of ice-cream bars sold affects the number of milkshakes sold. D) The number of soccerballs a team owns affects the number of games the team wins during the soccer season. Show Answer Correct Answer: B) The amount of time a cell phone is used affects the charge of its battery. 42. Which of the following values of r shows the strongest correlation? A) 0.50. B) 0.26. C) -0.12. D) -0.57. Show Answer Correct Answer: D) -0.57. 43. Distance traveled vs. amount of gas in the car A) Positive Correlation. B) Negative Correlation. C) No Correlation. D) None of the above. Show Answer Correct Answer: B) Negative Correlation. 44. Data is analyzed comparing hours studied and grades. It is determined that the correlation coefficient is 0.92. This means there is a (a) between studying and grades. A) A. strong positive correlation. B) Strong negative correlation. C) Weak negative correlation. D) Weak positive correlation. Show Answer Correct Answer: A) A. strong positive correlation. 45. Scale of x and y matters. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 46. What would the correlation be between math grades and the time it takes to run a mile? A) No Correlation. B) Negative Correlation. C) Postive Correlation. D) Cannot Be Determined. Show Answer Correct Answer: A) No Correlation. 47. Correlation coefficient is represented by "R" . A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 48. DESCRIBE THE LIKELY CORRELATION BETWEEN NUMBER OF PAGES IN BOOK ANDLENGTH OF TIME REQUIRED TO READ BOOK A) POSITIVE. B) NEGATIVE. C) NO CORRELATION. D) None of the above. Show Answer Correct Answer: A) POSITIVE. 49. What does a positive correlation indicate? A) Both sets of data values increase together. B) One set of data increases as the other set decreases. C) There is no relationship between the two sets of values. D) The scatter plot is scattered all over the place. Show Answer Correct Answer: A) Both sets of data values increase together. 50. Describe the correlation: "The outside temperature and the number of people in attendance at the beach." A) Positive. B) Negative. C) None. D) None of the above. Show Answer Correct Answer: A) Positive. 51. Which of these scenarios does not imply causation? A) The more miles driven, the more gasoline needed. B) The higher the hourly wage, the greater the income for 40 hours of work. C) The faster the pace of the runner, the more quickly the runner finishes. D) The more the rooster crows, the more often it rains. Show Answer Correct Answer: D) The more the rooster crows, the more often it rains. 52. An investigation was done to see if keeping the lights on for different amount of time each day affected the number of eggs the chicken lay.What is the DEPENDENT VARIABLE? A) The amount of time the lights are on. B) The number of eggs you can eat in a day. C) The number of eggs the chicken will lay. D) The brightness of the lights. Show Answer Correct Answer: C) The number of eggs the chicken will lay. 53. Identify the explanatory variable:Age of students and whether they are allowed to stay up past 11:00PM on a school night. A) Age of Students. B) Bedtime. C) Day of the Week. D) Parents' Education Level. Show Answer Correct Answer: A) Age of Students. 54. Which one of these examples is NOT an example of CAUSATION? A) Kryptonite causes Superman to lose all his powers. B) Temperatures of less than 32$^\circ$F cause water to freeze. C) Umbrellas cause rainstorms. D) Stepping on the gas pedal causes a car to move faster. Show Answer Correct Answer: C) Umbrellas cause rainstorms. 55. What does it mean when we say 'correlation does not mean causation'? A) A strong correlation always implies a cause-and-effect relationship. B) A strong correlation never implies a cause-and-effect relationship. C) A strong correlation sometimes implies a cause-and-effect relationship. D) A strong correlation is always a result of causation. Show Answer Correct Answer: C) A strong correlation sometimes implies a cause-and-effect relationship. 56. What can we determine about the relationship between two variables from the correlation coefficient? A) Strength + Style. B) Percentage + Direction. C) Style + Type. D) Strength + Direction. Show Answer Correct Answer: D) Strength + Direction. 57. Which of these correlations represent causation? A) As the number of high schools increases, the number of enrolled students goes up. B) As the number of weddings increases, the number of marriage licenses increases. C) As the number of gym memberships increases, the number of people who lose weight increases. D) As the number of visitors to theme parks increases, the number of hamburgers sold at theme park concession stands increases. Show Answer Correct Answer: B) As the number of weddings increases, the number of marriage licenses increases. 58. Temperature and number of people wearing jackets A) Positive Correlation. B) Negative Correlation. C) No Correlation. D) None of the above. Show Answer Correct Answer: B) Negative Correlation. 59. What are the variables in a correlation called? A) Independent Variables. B) Dependent Variables. C) Independent and Dependent Variables. D) Co-variables. Show Answer Correct Answer: D) Co-variables. 60. What does a correlation coefficient of 0 represent? A) A weak positive correlation. B) No correlation. C) A strong positive correlation. D) A strong negative correlation. Show Answer Correct Answer: B) No correlation. 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