🎉 Announcing Numerade's $26M Series A, led by IDG Capital!Read how Numerade will revolutionize STEM Learning # Prealgebra ## Carol E. Malloy, Rhonda J. Molix-Bailey, Jack Price ## Chapter 12 ## More Statistics and Probability ## Educators ### Problem 1 Display each set of data in a stem-and-leaf plot. Ashley V. Numerade Educator ### Problem 2 Display each set of data in a stem-and-leaf plot. Ashley V. Numerade Educator ### Problem 3 Use the test score data shown at the right. Find the lowest and highest scores. Ashley V. Numerade Educator ### Problem 4 Use the test score data shown at the right. What is the median score? Ashley V. Numerade Educator ### Problem 5 Use the test score data shown at the right. Write a statement that describes the data. Ashley V. Numerade Educator ### Problem 6 Use the food data shown in the back-to-back stem-and-leaf plot. What is the greatest number of fat grams in each sandwich? Ashley V. Numerade Educator ### Problem 7 Use the food data shown in the back-to-back stem-and-leaf plot. In general, which type of sandwich has a lower amount of fat? Explain. Ashley V. Numerade Educator ### Problem 8 Display each set of data in a stem-and-leaf plot. Ashley V. Numerade Educator ### Problem 9 Display each set of data in a stem-and-leaf plot. Ashley V. Numerade Educator ### Problem 10 Display each set of data in a stem-and-leaf plot. (TABLE CANT COPY) Ashley V. Numerade Educator ### Problem 11 Display each set of data in a stem-and-leaf plot. Ashley V. Numerade Educator ### Problem 12 Use the table shown. Display the number of home runs in a stem-and-leaf plot. Ashley V. Numerade Educator ### Problem 13 Use the table shown. What is the most home runs hit between 1995 and$2005 ?$ Ashley V. Numerade Educator ### Problem 14 Use the table shown. How many of the season leaders hit fewer than 50 home runs? Ashley V. Numerade Educator ### Problem 15 Use the table shown. What is the median number of home runs hit by a single season home run leader? Ashley V. Numerade Educator ### Problem 16 Use the table shown. Write a sentence that describes the data. Ashley V. Numerade Educator ### Problem 17 Use the information shown in the back-to-back stem-and-leaf plot. What is the greatest number of games won by a Big Ten Conference team? Ashley V. Numerade Educator ### Problem 18 Use the information shown in the back-to-back stem-and-leaf plot. What is the least number of games won by a Big East Conference team? Ashley V. Numerade Educator ### Problem 19 Use the information shown in the back-to-back stem-and-leaf plot. What is the least number of games won by a Big East Conference team? Ashley V. Numerade Educator ### Problem 20 Use the information shown in the back-to-back stem-and-leaf plot. Compare the median number of games won by each conference. Ashley V. Numerade Educator ### Problem 21 Use the Internet, a newspaper, or another reference source to gather data about a topic that interests you. Make a stem-and-leaf plot of the data. Write a sentence that interprets the data. Check back soon! ### Problem 22 Tell whether each statement is sometimes, always, or never true. A back-to-back stem-and-leaf plot has two sets of data. Ashley V. Numerade Educator ### Problem 23 Tell whether each statement is sometimes, always, or never true. A basic stem-and-leaf plot has two keys. Ashley V. Numerade Educator ### Problem 24 Display each set of data in a stem-and-leaf plot. Olympic Men's 400-m Hurdles Time$(s), 1900-2004$$$\begin{array}{|llllll|} \hline 57.6 & 53.0 & 55.0 & 54.0 & 47.5 & 48.7 \\52.6 & 53.4 & 51.7 & 52.4 & 47.5 & 51.1 \\50.8 & 50.1 & 49.3 & 49.6 & 48.1 & 47.8 \\47.6 & 47.8 & 47.2 & 46.8 & 47.6 & \\\hline \end{array}$$ Ashley V. Numerade Educator ### Problem 25 Display each set of data in a stem-and-leaf plot. Heights (ft) of Tallest Buildings in Miami, Florida $$\begin{array}{|llllll|}\hline 789 & 435 & 625 & 559 & 487 & 792 \\510 & 480 & 460 & 484 & 450 & 500 \\520 & 764 & 559 & 492 & 474 & 484 \\\hline\end{array}$$ Ashley V. Numerade Educator ### Problem 26 Display the foot lengths, in inches, of the students in your class in a stem-and-leaf plot. Then write a few sentences that analyze the data. Check back soon! ### Problem 27 Suppose you have a frequency table and a stem-and-leaf plot that display the same data. For which display is it easier to find the median? Explain. Ashley V. Numerade Educator ### Problem 28 Suppose you have a frequency table and a stem-and-leaf plot that display the same data. For which display is it easier to find the mean? Explain. Ashley V. Numerade Educator ### Problem 29 Suppose you have a frequency table and a stem-and-leaf plot that display the same data. For which display is it easier to find the mode? Explain. Ashley V. Numerade Educator ### Problem 30 The stem-and-leaf plot shows the heights of students in an eighth-grade class. Janice says that the number of students in the class is$61-46,$or$15 .$Kirk says that the number of students in the class is the number of leaves, or$25 .$Who is correct? Explain your reasoning. (TABLE CANT COPY) Ashley V. Numerade Educator ### Problem 31 Use the data about the Electoral College on page 626 to explain how stem-and-leaf plots can help you understand an election. Include a stem-and-leaf plot and an explanation telling how a presidential candidate might use the display. Check back soon! ### Problem 32 The back-to-back stem-and-leaf plot shows the amount of protein in certain foods. Which of the following is a true statement? A The median amount of protein in dairy products is 9 grams. B The difference between the greatest and least amount of protein in dairy products is 28 grams. C The average amount of protein in legumes, nuts, and seeds is more than the average amount in dairy products. D The greatest amount of protein in legumes, nuts, and seeds is 93 grams. Ashley V. Numerade Educator ### Problem 33 Determine whether a cone with a height 14 centimeters and radius 8 centimeters is similar to a cone with a height of 12 centimeters and a radius of 6 centimeters. Ashley V. Numerade Educator ### Problem 34 Find the surface area of each solid. Round to the nearest tenth, if necessary. Ashley V. Numerade Educator ### Problem 35 Find the surface area of each solid. Round to the nearest tenth, if necessary. Ashley V. Numerade Educator ### Problem 36 Find the surface area of each solid. Round to the nearest tenth, if necessary. Ashley V. Numerade Educator ### Problem 37 At the same time a 40-foot silo casts a 22-foot shadow, a fence casts a$3.3 \text { -foot shadow. Find the height of the fence. Ashley V.

### Problem 38

Express each decimal or fraction as a percent. Round to the nearest hundredth percent, if necessary.
$$0.36$$ Ashley V.

### Problem 39

Express each decimal or fraction as a percent. Round to the nearest hundredth percent, if necessary.
$$2.47$$ Ashley V.

### Problem 40

Express each decimal or fraction as a percent. Round to the nearest hundredth percent, if necessary.
$$0.019$$ Ashley V.

### Problem 41

Express each decimal or fraction as a percent. Round to the nearest hundredth percent, if necessary.
$$0.0065$$ Ashley V.

### Problem 42

Express each decimal or fraction as a percent. Round to the nearest hundredth percent, if necessary.
$$\frac{6}{25}$$ Ashley V.

### Problem 43

Express each decimal or fraction as a percent. Round to the nearest hundredth percent, if necessary.
$$\frac{4}{7}$$ Ashley V.

### Problem 44

Express each decimal or fraction as a percent. Round to the nearest hundredth percent, if necessary.
$$\frac{15}{8}$$ Ashley V.

### Problem 45

Express each decimal or fraction as a percent. Round to the nearest hundredth percent, if necessary.
$$\frac{24}{1500}$$ Ashley V.

### Problem 46

The perimeter of a rectangular window in an office building is 204 inches. The length is 6 inches less than twice the width. Find its length. Ashley V.

### Problem 47

Find the median for each set of data. Round to the nearest tenth, if necessary.
$$23,45,21,35,28$$ Ashley V.

### Problem 48

Find the median for each set of data. Round to the nearest tenth, if necessary.
$$78,54,50,64,39,45$$ Ashley V.
$$0.4,1.3,0.8,1.8$$ 