Question

the average (mean) of a data set is calculated by: a. adding the highest and lowest numbers together b. finding the most frequently occurring number c. multiplying all numbers together d. dividing the sum of all numbers by the count of numbers

Explanation:

The mean (average) of a data set is calculated by dividing the sum of all the numbers in the data set by the count of numbers. Option a describes finding the mid - range (not the mean). Option b is the definition of the mode. Option c is not a standard statistical measure for central tendency. Option d correctly follows the formula for the mean: $\text{Mean}=\frac{\sum_{i = 1}^{n}x_{i}}{n}$, where $\sum_{i = 1}^{n}x_{i}$ is the sum of the data points and $n$ is the number of data points.

Answer:

d. Dividing the sum of all numbers by the count of numbers