15.
How many values are in the data set whose histogram is shown below?

The total values in the dataset is 24 values
From the given histogram, to get the number of values in the dataset, we will have to trace each bar to the y-axis and then take the sum.
The total values of the dataset = 13 + 3 + 3 + 5
The total values of the dataset = 24 values
Hence the total values in the dataset is 24 values
Learn more on histogram here: https://brainly.com/question/9388601