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50 airport data speeds (in Mbps) are provided.

The third quartileis the same as the 75^th percentile, that is,

$Q_3=P_{75}$

The value of the 75th percentile needs to be computed to compute the value corresponding to the third quartile.

A value in the given percentile is found using the given formula:

Here, L is the locator of the value;

k is the percentile of the value;

n is the total number of values.

List all the values in increasing order and follow the steps.

• Count the total number of values.
• For k=75, compute the value of L.

Therefore,

$$\begin{gathered} L=\frac{k}{100}脳n \\ =\frac{75}{100}脳50 \\ =37.5 \\ 鈮�38\left(\text{rounded}\text{to}\text{the}\text{next}\text{whole}\text{number}\right) \end{gathered}$$

The value corresponding to the 38^th observation from the sorted data is 3.8 Mbps.

Therefore,the data speed corresponding to the third quartile is 3.8 Mbps.