A sample of  17  participants took part in a hearing experiment. Among other things, the absolute hearing threshold (in decibels) was measured for each participant. The  17  measurements were as follows:   25, 22, 18, 35, 37, 34, 31, 27, 24, 21, 18, 30, 30, 26, 26, 26, 23 Draw the histogram for these data using an initial class boundary of  17.5  and a class width of  4 . Note that you can add or remove classes from the figure. Label each class with its endpoints.

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Average

In mathematics, everyone must have heard the term average in one place or other. Almost all types of calculation require taking out an average. In everyday life, the term is used for denoting a certain amount that can be said to be a typical quantity for multiple people or objects. In other words, if a group of people possesses a certain object, then the average gives us an idea regarding the quantity of the object possessed by each person. However, this is solely based on mathematical calculation. It is important to note that most people will not strictly have the average value in a group.