STAT 1350, Spring 2022 The Super Bowl is coming up soon. Do you plan to watch it? What snacks will you eat while watching the game? A sample ofsizc n 2000 adults was surveyed and asked to name the best food to serve at a Super Bowl party. The responses to this survey are presented in the table below. Should a pie chart be used to graph this data? Food Percentage Chicken wings 50% Pizza 45% Chicken bites 3 8% Mozzarella sticks 33% Chips 32% . Yes. The data is categorical, so a pie chart is appropriate. . No. We should only use a pie chart when we have fewer than five categories. . Yes. We should use a pie chart any time we have fewer than six categories. . No. The percentages sum to more than 100%. . Yes. Any time a survey is about food, a pie chart should be used. 2. A(n) I I I I I I I I I I is an observation that falls outside the overall pattern of the graph. A. category B. inconsistency C. outlier D. midpoint E. trend 3. A random sample of college students was asked to indicate how many credits they are currently enrolled in this semester. Responses ranged from 3 credits to just under 21 credits. This data is presented in the histogram below. How would you describe the shape of this distribution? Frequency 12 Credits A. Symmetric B. Skewed to the left C. Skewed to the right D. Irregular E. Uniform 4. The histogram below summarizes the pitch speed (in miles per hour, or mph) of a sample of 75 pitches from a single college pitcher during one baseball season. What is the midpoint of this distribution? Frequency 80 85 90 93 100 105 Pitch Speed (mph) A. The midpoint is between 90 and 95. B. The midpoint is between 80 and 85. C. The midpoint is between 100 and 105. D. To find the midpoint, we must subtract 80 from 105 and then divide by 2. E. It's impossible to determine what the midpoint is simply by looking at a histogram. 25. A sample of adults was asked to complete a puzzle. The time each adult in the sample took to complete the puzzle was recorded, and a histogram was constructed to display the distribution of puzzle-solving times. This histogram is shown below. Based on what you see in this histogram, what was the sample size? Frequency -NWAVON OOD 5 7 9 11 13 15 17 19 21 Time (minutes) A. 50 B. 45 C. 90 D. 36 E. It is impossible to answer this question without more information. 6. A Gallup survey administered in 2005 asked a random sample of adults to pick their one favorite day of the week. Responses to the survey are displayed in the graph below. Should we describe this distribution as being skewed to the right? America's favorite days %% of respondents naming each day as their favorite in a 2005 Gallup survey 18 12 Friday Saturday Sunday Monday Wed. Thursday Tuesday A. Yes. B. No, because the distribution is actually skewed to the left, not to the right. C. No, because we only talk about skewness when we are displaying the distribution of a categorical variable, and "favorite day of the week" is a quantitative variable. D. No, because you need at least eight bars in a bar graph in order to judge the distribution as being skewed. E. No, because the bars can be ordered arbitrarily, so we should not refer to bar graphs as being skewed in a particular direction. 37. Since 2008, a total of 27 Marvel movies have been made. The movies vary in terms of length, and the histogram below displays the distribution of lengths, in minutes, of these 27 movies. Approximately what percentage of these movies are less than 130 minutes long? Frequency 120 130 140 150 150 170 Length in minutes A. 50% B. 30% C. 12% D. 44% E. 19% 8. A sample of college students was asked to indicate the number of hours of sleep they received last night. Their responses are included in the histogram below. Which one of the following interpretations of this histogram is correct? Frequency Hours of sleep A. The distribution shows that the data is highly variable, with some students reporting getting more than 10 hours of sleep. B. No students in the sample reported getting exactly 5 hours of sleep. C. Only one student in the sample reported getting exactly 8 hours of sleep. D. The individuals in this data set are the hours. E. None of the above statements are correct.9. A large sample of adults was surveyed and asked the following question: "If you could have one superpower, what would it be?" Survey respondents could choose from among 10 different superpowers, or they could select the option of "None of the above." The percentage who chose each option are shown in the table below. Assuming that the percentages in the table are accurate and all respondents gave an answer to this question, what percentage must have answered "Flying"? Desired Superpower Percentage Invisibility 15.15% Healing 14.5% Time travel 13.8% Flying ? Immortality 8.55% Teleportation 6.55% Ability to communicate with animals 6.2% Mind control 5.15% Telepathy 2.45% Superhuman strength 2% None of the above 13.75% A. 0.2% B. 9.35% C. 11.9% D. 15% E. It's impossible to answer this question without more information. 10. A local library sends out a survey about reading habits to a random sample of 150 recent library customers. Among other things, customers are asked to indicate their age in years, their favorite book, their most preferred type of book (fiction or non-fiction), the time (in minutes) they spent reading in the last week, and their occupation. We would consider time spent reading in the last week to be a and favorite book to be a A. categorical variable; categorical variable B. numerical variable; numerical variable C. response variable; explanatory variable D. categorical variable; numerical variable E. numerical variable; categorical variable