Question

what is the mean? 95, 855, 224, or 123what is the median? 65, 95, 123, 224what is the mode? 123, 224, 95, or 65what is the range? 224, 95, 65, 123

Answer 1

`\begin{gathered} \text{Mean}=\text{ 95} \\ \text{Median}=65 \\ \text{Mode}=\text{ 123} \\ \text{Range}=224 \end{gathered}`

Explanation:

We have the following data set:

245,65,123,123,22,43,36,177,21

1. To find the mean of a data set, add up all numbers, then divide by how many numbers there are:

`\begin{gathered} \text{ mean=}(855)/(9) \\ \text{ mean=95} \end{gathered}`

2. The median is the middle of a sorted list of numbers, we have to put it in value order:

`\begin{gathered} 21,22,36,43,65,123,123,177,245 \\ \text{ Median=65} \end{gathered}`

3. The mode is the value that appears most frequently in a data set, then the mode for this data set would be 123.

4. The range is the difference between the lowest and highest value, then:

`245-21=224`