Question

Screen Time
Hours above below
less than 4 hours 8 6
4-8 hours 15 10
8-12 hours 10 18
more than 12 hours 16 18

What percent of the students who spend 8-12 hours a week on screens reported a grade average above 80? Round your answer to the nearest whole number percent.

Answer 1

To find the percentage of students who spend 8-12 hours a week on screens and reported a grade average above 80, we first need to identify the relevant numbers from the data provided.

From the table for students who spend 8-12 hours on screens:
- Number of students who reported a grade average above 80: 10
- Number of students who reported a grade average below 80: 18

Now, we calculate the total number of students in the 8-12 hours category:
\[
\text{Total} = \text{Above 80} + \text{Below 80} = 10 + 18 = 28
\]

Next, we calculate the percentage of students who reported a grade average above 80:
\[
\text{Percentage} = \left(\frac{\text{Number above 80}}{\text{Total number}}\right) \times 100 = \left(\frac{10}{28}\right) \times 100
\]

Calculating this gives:
\[
\text{Percentage} \approx \left(\frac{10}{28}\right) \times 100 \approx 35.71\%
\]

Rounding to the nearest whole number, the percentage is:
\[
\boxed{36\%}
\]