The students in Ms. Rodriguez's class reported the number of hours they spend exercising in a

Question

typical week. They recorded their answers in a dot plot.
Ms. Rodriguez's Class
X
X
X
X
X
X
X
XXXXX XX
X
X
X
十
+
1
T~
2
27-
4
3
4
Hours Spent Exercising What is the mean of their data?

Answer 1

To calculate the mean from the dot plot data, we first need to tally the number of hours spent exercising based on the representation of the dots. From your description, it seems you may have provided a text representation of the dot plot, but it’s not entirely clear.

Let's assume the following interpretation of the dot plot based on your message:

• 0 hours: 7 dots (7 students)
• 1 hour: 4 dots (4 students)
• 2 hours: 5 dots (5 students)
• 3 hours: 2 dots (2 students)
• 4 hours: 1 dot (1 student)

Now, we can summarize the data:

• Total number of students = 7 + 4 + 5 + 2 + 1 = 19
• We'll calculate the total number of hours by multiplying each group by the number of students in that group:

1. For 0 hours: \(0 \times 7 = 0\)
2. For 1 hour: \(1 \times 4 = 4\)
3. For 2 hours: \(2 \times 5 = 10\)
4. For 3 hours: \(3 \times 2 = 6\)
5. For 4 hours: \(4 \times 1 = 4\)

Now, add those values together to find the total hours:

\[ 0 + 4 + 10 + 6 + 4 = 24\text{ total hours} \]

Now, we can calculate the mean:

\[ \text{Mean} = \frac{\text{Total hours}}{\text{Total students}} = \frac{24}{19} \approx 1.26 \]

Thus, the mean number of hours spent exercising by the students in Ms. Rodriguez's class is approximately 1.26 hours.