e ey my g m e e e In a test for ESP (Extrasensory percep%on), the person being tested guesses which of five designs is on each of a set of 10 cards. The following dotplot shows the number of correct answers of 20 people taking this test. . * o o . b . ' . . - 4 5 6 7 8 9 10 Number of Correct Answers Which of the following best describes the type of variable represented in the dotplot? = reee nTesesesee wWwTeeee o+tee Quantitative and categorical Quantitative and discrete Quantitative and continuous Categorical and discrete Categorical and continuous 1 point A study of life expectancy versus health expenditures in developed countries resulted in the following scatterplot and regression line. [ At 2 W Saden France @ Boigum Aatia @ i Gy B Life Expectancy United Stales - Health Expenditures per Capita Which of the following is true about the point corresponding to the United States? It has high leverage and is a regression outlier. It has high leverage but is not a regression outlier. Itis aregression outlier but does not have high leverage. It is not a regression outlier and does not have high leverage. It has high leverage, but whether it is a regression outlier cannot be determined. 8 1 point A national journal showed the following distribution of favorite reading genres for high school students. Genres Fantasy Adventure Classics Romance Science Fiction |Horror Percentage 23% 20% 14% 18% 20% 5% A librarian from a high school of 900 students wants to see whether the distribution in her school matches that of the publication. She notes the genres for the first 80 books checked out of the library on the day before spring break. The following table records her observations. Genres Fantasy Adventure Classics Romance Science Fiction |Horror Observed 17 19 8 13 16 She asks an AP Statistics student to conduct a chi-square goodness-of-fit (GOF) test to see whether her high school's distribution differs significantly from that of the publication. However, the AP student tells her that not all conditions for inference have been met. Which of the following conditions have not been met? I. Random sample II. All expected counts are greater than 5. Ill. n s 0.10N O I only O Il only Ill only O I and II only O I and Ill onlyg 1 point A statistician investigated the relationship between ages and bowling scores for 30 participants in an adult bowling league. The regression analysis for her data is as follows. Predictor Coef SE Coef T P Constant 122.79 94.44 1.30 0.218 Age 3.342 1.200 2.78 0.017 $=37.3598 R-Sq = 84.0% Assuming all conditions for inference have been met, which of the following defines a 95% confidence interval for the slope of the least-squares regression line? 3.342 + 1.96(1.200) 3.342 + 2.045(1.200) 3.342 + 2.048(1.200) 3.342+ 1.96(37.3598) 122.79 + 2.045(94.44) 1 point For lunch at a high school cafeteria, students can choose milk, juice, or a soft drink for a beverage. The following table shows the number of students who chose each beverage on one randomly chosen day classified by whether or not the student was taking an AP class. Milk | Juice | Soft drink Taking AP 24 38 11 Not taking AP | 51 29 93 Total 75 67 104 If one student is chosen at random, what is the probability that the student chose juice given that the student is not taking an AP class? 29 67 29 173 20 246 67 246 i3 246 Total 73 173 246 $