The stem-and-leaf plot below shows the number of miles run by members of the cross-country team. How many students ran more than 30 miles?
A stem and leaf plot is shown in a table with 6 rows and two columns.The first column is labeled 'Stem' and contains the values 0, 1, 2, 3, and 4 in rows two through six. The second column is labeled 'Leaf' and contains the values 5 and 6 in row two, the values 2, 4, and 9 in row three, the values 2, 6, 7, and 8 in row four, the values 1, 2, 3, 5, and 9 in row five, and the values 2, 3, and 4 in row 6.
Key = 1 vertical line 2 equals 12
A. 3
B. 5
C. 8
D. 9
5 answers
There are a total of 9 students who ran more than 30 miles based on the stem-and-leaf plot. To see this, add up all the values in the rows with stems of 3 and 4, which represent miles in the 30s and 40s respectively. You get: 36 + 42 + 46 + 47 + 48 + 51 + 59 + 62 + 64 = 395. This means that 39.5 miles were run in total by all the students (since each leaf represents 0.5 miles), and since 30 miles is less than 3 full stems, we know that the number of students who ran more than 30 miles is the same as the number of leaves in the rows with stems of 3 and 4, which is 9. Therefore, the answer is D. 9.
The stem-and-leaf plot shows the ages of residents of a retirement home. How many residents are older than 80?
Ages of Residents
Sandy Ridge Autumn Care
Leaf
Stem
Leaf
1 3 4
6
0 2
1 3 3 5 6
7
2 4 5 6 6 6 8
2 4 4 4 7 9
8
1 2 2 4
1 1 6 6 8 8 9
9
1 2 9 9 9
0
10
0 1 2
A. Sandy Ridge, 6; Autumn Care, 4
B. Sandy Ridge, 13; Autumn Care, 11
C. Sandy Ridge, 8; Autumn Care, 9
D. Sandy Ridge, 14; Autumn Care, 12
Ages of Residents
Sandy Ridge Autumn Care
Leaf
Stem
Leaf
1 3 4
6
0 2
1 3 3 5 6
7
2 4 5 6 6 6 8
2 4 4 4 7 9
8
1 2 2 4
1 1 6 6 8 8 9
9
1 2 9 9 9
0
10
0 1 2
A. Sandy Ridge, 6; Autumn Care, 4
B. Sandy Ridge, 13; Autumn Care, 11
C. Sandy Ridge, 8; Autumn Care, 9
D. Sandy Ridge, 14; Autumn Care, 12
It's not clear from the given stem-and-leaf plot which column corresponds to the ages of residents who are older than 80. We need more information to answer this question.
Which survey question is biased?
A. “Should the President of the United States serve a six-year term?”
B. “Which meal—breakfast, lunch, or dinner—is your favorite meal of the day?”
C. “During which month do you prefer to go on vacation?”
D. “Do you prefer white bread or healthy, whole-wheat bread?”
A. “Should the President of the United States serve a six-year term?”
B. “Which meal—breakfast, lunch, or dinner—is your favorite meal of the day?”
C. “During which month do you prefer to go on vacation?”
D. “Do you prefer white bread or healthy, whole-wheat bread?”
D. “Do you prefer white bread or healthy, whole-wheat bread?” is biased because it frames the question in a way that suggests whole-wheat bread is inherently healthier than white bread, which may not be true for all individuals or cultural contexts. A more neutral way to ask this question would be to ask "Which type of bread do you prefer to eat: white or whole-wheat?"
1 answer