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
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
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?”
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?"
To determine the number of students who ran more than 30 miles, we need to look at the stem-and-leaf plot.
Based on the plot, we can see that there are numbers in the 30s, 40s, and 50s.
In the 30s, there is 1 number, which is 32.
In the 40s, there are 4 numbers, which are 42, 46, 47, and 48.
In the 50s, there are 4 numbers, which are 52, 53, 54, and 56.
Adding up the numbers, we have a total of 1 + 4 + 4 = 9 students who ran more than 30 miles.
Therefore, the correct answer is (D) 9.
To determine how many students ran more than 30 miles based on the stem-and-leaf plot, we need to look at the values in the plot that are greater than 30.
From the given stem-and-leaf plot, we can see that the first digit in each row represents the "stem" and the numbers listed beside it in each row represent the "leaves."
Looking at the "leaf" values, we can see that there are values such as 42, 47, and 49 in row four, 39 and 35 in row five, and 42, 43, and 44 in row six.
These values indicate that there are students who ran more than 30 miles.
Counting the values in each row, we find that there are 4 values in row four, 5 values in row five, and 3 values in row six.
So, the number of students who ran more than 30 miles is 4 + 5 + 3 = 12 students.
Therefore, the correct option is not provided in the given choices.