Question

the dot plot and box plot show the amount of time it took all students in one class to finish last nights homework assignment.
the teacher said the homework assignment would not take more than 30 minutes.
was the teacher correct?
the teacher was ? because ?% of the students completed the homework assignment in less than 30 minutes.

Explanation:

Step1: Count total number of students

Count all the dots in the dot - plot. There are \(1 + 3+2 + 1+1+1+1+2=12\) students.

Step2: Check if any student took more than 30 minutes

Looking at the dot - plot (values are \(20,21,21,21,22,22,24,25,27,28,28\)), all the times are less than 30 minutes. So the percentage of students who completed in less than 30 minutes is \(\frac{12}{12}\times100\% = 100\%\)

Answer:

The teacher was correct because \(100\%\) of the students completed the homework assignment in less than 30 minutes.