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Question 1 2 pts An owner of four convenience stores is interested in the number of people who purchase coffee at each of his four stores. The following bar chart shows the number of people who purchased coffee from each store for the rst 80 customers starting at 6:00 am. Number of People who Purchased Coffee 50 40 30 Frequency 20 1O Eastside Wesmide Northside Southside Store Which of the following statements is n_ot supported by the bar chart? 0 Less than half of the people who visited the Southside store bought coffee. 0 Only 25% of the people who visited the Eastside store bought coffee. 50% of the people who visited the Northside store bought coffee. 0 20 fewer people bought coffee at Southside than Northside. D Question 2 2 pts The table displays data collected from a sample of people who visited the library. Checked out a Person book Age Group Type of Book(s) Library Card Person A yes young adult fiction yes Person B no adult N/A no Person C yes child fiction no Person D yes adult nonfiction yes Person E no adult fiction yes Which of the variable in the table could have been reported differently such that the variable would be classified as quantitative? O Age Group O Type of Book(s) O Checked out a book Library CardQuestion 3 2 pts A Hampton Roads Bridge-Tunnel engineer is collecting data on different variables related to trafc on the Bridge-tunnel. Of the following variables, which will be measured using continuous data? 0 The number of seagulls hit by cars and trucks on the bridge-tunnel each day. The number of minutes for a car to get from the start of the bridge-tunnel to the end. 0 The number of cars that travel on the bridge-tunnel from 8 am. to 9 am. 0 The number of trucks that travel on the bridge-tunnel from 11 pm. to 5 am. _ Data are collected on 45 people who visit the library on a given day. Which of the following is a quantitative variable? 0 Whether or not they checked out a book 0 Age group; child, young adult, adult 0 Type of book checked out; Fiction or Nonction The number of minutes the person was at the library D Question 5 2 pts Hunters reported a record harvest of 3,566 bears during the 20192020 bear hunting season in Virginia. The data below show the number of bears harvested by each county during the 2019 hunting season. Frequency :30 ISL m. 203 Virginia black bear harvest By county 2019 Which of the following best describes the shape of this distribution? Source: h_ttps://dwrivirggoV/wildlife/bear/harvestsummaryfbear-harvest-by-countyi [3' O The distribution is symmetric O The distribution is uniformly distributed The distribution is skewed to the right 0 The distribution is skewed to the left D Question 6 2 pts The Joy of Shopping grocery store just added self-checkouts. The manager is concerned that the self-checkouts may force him to reduce the number of check-out clerks at the store. In order to determine whether the self-checkout lines will significantly reduce the number of check-out clerks he needs, he randomly samples 35 customers using the self-check lane and measures the time in minutes it takes each customer to check out. The data is shown in the graph below. Checkout time (mins) for n=35 customers 12 4 9 Frequency 6 - W 2 3 4 5 6 7 8 9 10 11 checkout Which of the following best describes the shape of this distribution? The distribution is skewed to the left The distribution is uniformly distributed The distribution is skewed to the right The distribution is roughly symmetricI Question 7 During July, the daily high temperature in Virginia Beach is around 86F. The daily high temperature forJuly in a specic year are shown in the histogram below. Frequency is a: M 0 78 82 86E!) 9498102106 DallleulyzLg Temperature Based on the histogram, which of the following is the best description of the distribution? 0 The distribution is uniform O The distribution displays a gap with potential outliers between 78 and 82 0 The distribution displays two clusters with no apparent outliers The distribution displays a gap with a potential outlier between 102 and 106 Question 8 2 pts In many states, the hunting day starts a half-hour before sunrise because animals are moving and there is enough light to identify them. Daybreak begins with the rst appearance of light about a half-hour before the sun comes up. Sunrise is the instant when the top of the sun just appears on the sea-level horizon. Game and Wildlife experts in Minnesota took measurements of the number of minutes between daybreak and sunrise. The data from the rst 45 days of duck hunting season is shown in the plot below. 0 a co 5 00 g 000 2 e 0000 u.-, e 00.00 c.8388833 eeeeeeeeee 24252627282930313233 ~Timelin mine between daybreak'andeunriee Which of the following statistics would best describe the center and spread of this distribution? 0 Center: Mean Spread: Standard Deviation 0 Center: Mean Spread: IQR Center: Median Spread: IQR 0 Center: Median Spread: Standard Deviation Question 9 2 pts The distribution of age (in years) for customers who bought eggs at the farmer's market is shown in the boxplot below. Age 16 23 33 38 65 lllllllllllll 10 I 5 20 25 30 35 40 45 50 55 60 65 70 Age of Customer Which of the following statements is supported by the boxplot? O Roughly 25% of the customers are less than 38 years old. 0 The number of customers with an age of at least 38 years is greater than the number of customers with an age of at most 23 years. 0 Roughly 50% of the customers were between 23 and 38 years old. 0 The number of customers with an age of at least 33 years is less than the number of customers with an age of at most 33 years. Question 10 2 pts Statistics from a study on the time it takes for a customer to use the self-checkout lane indicate that 50% of the customers take more than 5 minutes and that the average time is 9.6 minutes. What do these ndings suggest about the shape of the distribution of the time it takes to use the self-checkout lane? 0 The distribution would be skewed to the left since the mean is greater than the median. O The distribution would be skewed to the right since the mean is greater than the median. O The distribution would be skewed left because 50% of the customers would take less than 5 minutes to checkout. 0 The distribution would be approximately uniform since the mean and median are relatively close in value. Question 11 2 pts The following table shows the number of surfboards rented from a beach rental shop for a week in June. Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday Number of Surfboards 23 12 15 14 17 21 25 What is the IQR of the number of surfboards rented from this shop this week? O 17 O 13 0 9 O 23D Question 12 2 pts Game and Wildlife officials keep count of the number of ducks harvested by hunters at Ware Creek during the months of December and January. The number of ducks harvested each day for the two months is recorded in the boxplots below. Ducks (December) 22 31 35 39 58 Ducks (January) 25 34 46 49 20 25 30 50 55 60 65 70 Number of Ducks Based on the boxplots, which of the following is the best comparison of the medians and IQR's of the two distributions? The median and the IQR for ducks harvested in January are greater than the median and IQR for ducks harvested in December. O The median for the ducks harvested in January is greater than the median for December. The IQR for the ducks harvested in December is greater than the IQR for January. O The median for the ducks harvested in January is greater than the median for December. The IQR's for both distributions are roughly the same. O The median and the IQR for both distributions are roughly the same.D Question 13 2 pts The following table shows summary statistics in thousands of the number of full-time and part- time workers in a certain region for the past five years. Type of Worker |Minimum First Quartile Median Third Quartile Maximum Full-time 240 270 290 305 402 Part-time 192 235 285 310 415 Based on the 1.5XIQR rule for outliers, which of the following statements is a correct comparison of the two distributions. O The full-time worker's distribution has at least one upper outlier and the part-time worker's distribution has no upper outliers. O The full-time worker's distribution and the part-time worker's distribution both have upper outliers. The full-time worker's distribution and the part-time worker's distribution both have lower outliers. O The full-time worker's distribution has no lower outliers and the part-time worker's distribution has at least one lower outlier.Question 14 2 pts At the State Fair, the distribution of the time a person will wait in line for a ride on the Farris Wheel is approximately normal with a mean of 9.8 minutes. Approximately 95% of all people wait between 6.2 and 13.4 minutes for this ride. What is the standard deviation of this distribution? 0 1.8 minutes 0 7.2 minutes 0 6.5 minutes 0 3.6 minutes Question 15 2 pts Standardized test scores like the SAT can be approximated by a normal model. Suppose the SAT mathematics scores can be approximated by a normal model. If the probability that a randomly selected score is at least 1190 is 0.3264, what is the probability that a randomly selected score is less than 1190? 0 0.3264 0 0.50 0 0.7281 0 0.6736 D Question 16 2 pts The run times of a marathon runner are approximately normally distributed. The z-score for his run this week is -2. Which one of the following statements is a correct interpretation of his z-score? O This week his time was 2 standard deviations lower than his average time. O This week his time was 2 minutes lower than his time last week. 0 This week his time was 2 minutes lower than his best time ever. 0 This week his time was 2 standard deviations lower than his time last week. D Question 17 2 pts The average daily high temperature in July in Harrisonburg Va is 81F with a standard deviation of 5F. Suppose that the temperatures in July follow a normal distribution. How cool are the coldest 10% of the days? 0 Temperatures s 74.6 O Temperatures s 69.4\" 0 Temperatures s 86\" O Temperatures s 72.8\