<p> Pre-Algebra Practice Test: DATA ANALYSIS</p><p>Name:</p><p>Date:</p><p>Define the terms below:</p><p>1. interquartile range</p><p>2. outlier</p><p>3. mean</p><p>4. You want to make a stem-and-leaf plot of the following data: 24, 44, 31, 42, 26, and 37. What numbers would you use as stems?</p><p>5. Make a stem-and-leaf plot to show the prices (in dollars) of coats sold at a local store. Prices of Coats (in dollars) 38, 45, 45, 53, 63, 65, 30, 51, 54, 42, 66</p><p>Pre-Algebra Practice Test Data Analysis Page 1 of 5 Pre-Algebra Practice Test Data Analysis Page 2 of 5 6. The data below shows the number of minutes players on a baseball team spent in batting practice. Time Spent in Batting Practice (in minutes) 15, 22, 31, 12, 23, 37, 31, 21, 21, 11</p><p>Which stem-and-leaf plot accurately displays the data?</p><p>A StemLeaf11 1 5 21 B StemLeaf11 2 5 21 . 1 2 3 31 1 7 . 1 2 3 31 1 7 Key: 3|1 = 31min Key: 3|1 = 31min</p><p>C StemLeaf11 2 5 20 D StemLeaf11 2 5 21 . 1 2 3 31 1 7 . 2 2 3 31 1 7 Key: 3|1 = 31min Key: 3|1 = 31min</p><p>7. The table is the start to a frequency table for ScoresTallyFrequency9994918987827776656 the test scores in a math class. Complete the 1 table.</p><p>Make a histogram for the data.</p><p>Pre-Algebra Practice Test Data Analysis Page 3 of 5 Use the plot below for questions #8 and #9.</p><p>< > 25 30 35 40 45 50 55 60 </p><p>8. What is the interquartile range?</p><p>9. What percent of the data falls between 25 and 50?</p><p>10. The box-and-whisker plots below show the average monthly temperatures for City A and City B. What 2 conclusions can you make?</p><p>Average Temperatures</p><p>City A</p><p>City B < > 20 30 40 50 60 70 80 90</p><p>11. A store has watches at the following prices. Make a box-and-whisker plot for the data. Show all work. Prices of Watches (in dollars) 15 18 19 20 31 33 41 45 57 62 71 80 80 81 110</p><p>12. Refer to problem #11. If all watches under $20 are on sale, what fraction of the watches are on sale?</p><p>Pre-Algebra Practice Test Data Analysis Page 4 of 5 Here are the scores for a school basketball team: 47, 68, 50, 34, 64, 47, and 54. 13. Find the mean</p><p>14. Find the mode</p><p>15. Find the median</p><p>16. Find the range.</p><p>17. A survey finds that 140 families in a random sample of 700 families in a town own an HD television. The town has 5000 families. Predict how many families in the town own an HD television. Show your work.</p><p>18. A school has 1200 students. A survey of a random sample of 100 students found the 30 students have part-time jobs. The survey has a margin of error of ±3%. Find the interval in which the total number of students who have part-time jobs is likely to lie.</p><p>19. The chart shows prices for two different types of potatoes. The pattern of prices continues for heavier bags. Bag Weight Potato A Potato B 10 lb $2.50 $3.75 15 lb $4.00 $5.00 20 lb $5.50 $6.25 25 lb $7.00 $7.50 What is the cost of a 40 lb bag of Potatoes B?</p><p>20. What is misleading about the display of data in the histogram?</p><p>Pre-Algebra Practice Test Data Analysis Page 5 of 5</p>