Final answer:
The value of the third quartile is 44.
Step-by-step explanation:
The value of the third quartile is 44.
To find the third quartile, we first need to determine the median of the upper half of the data. Since there are 40 students in total, the upper half will have 20 students. The data point at the 10th position in the upper half will be the third quartile.
By looking at the dotplot and counting the data points, we can see that the value at the 10th position in the upper half is 44.