Question

1. Brian's math test scorés: 86, 90, 93, 85, 79, 92, 20, 84Mean:Median:

Answer 1

`\begin{gathered} \text{ Mean=78.625} \\ \text{Median}=84 \end{gathered}`

Explanation:

The mean is the sum of all the values in a set of data, divided by the number of values on the list.

Hence, the mean of Brian's math test scores:

`\begin{gathered} \text{ Mean= }(86+90+93+85+79+92+20+84)/(8) \\ \text{ Mean=}(629)/(8) \\ \text{ Mean=78.625} \end{gathered}`

The median is the middle number in a sorted, ascending or descending, list of numbers:

Arrange the data set from smallest to largest, if the number of data set is even, the median is the average of the two middle data points in the list.

`20,79,84,82,86,90,92,93`

Hence, the median is the average of 82 and 86:

`\begin{gathered} \text{Median}=(82+86)/(2) \\ \text{Median}=84 \end{gathered}`